A simple feature, including geometry and attributes. More...

#include <ogr_feature.h>

Classes
class	ConstFieldIterator
	Field value iterator class. More...

class	FieldNotFoundException
	Exception raised by operator[](const char*) when a field is not found. More...

class	FieldValue
	Field value. More...

Public Member Functions
	OGRFeature (OGRFeatureDefn *)
	Constructor. More...

ConstFieldIterator	begin () const
	Return begin of field value iterator. More...

ConstFieldIterator	end () const
	Return end of field value iterator. More...

const FieldValue	operator[] (int iField) const
	Return a field value. More...

FieldValue	operator[] (int iField)
	Return a field value. More...

const FieldValue	operator[] (const char *pszFieldName) const
	Return a field value. More...

FieldValue	operator[] (const char *pszFieldName)
	Return a field value. More...

OGRFeatureDefn *	GetDefnRef ()
	Fetch feature definition. More...

const OGRFeatureDefn *	GetDefnRef () const
	Fetch feature definition. More...

OGRErr	SetGeometryDirectly (OGRGeometry *)
	Set feature geometry. More...

OGRErr	SetGeometry (const OGRGeometry *)
	Set feature geometry. More...

OGRGeometry *	GetGeometryRef ()
	Fetch pointer to feature geometry. More...

const OGRGeometry *	GetGeometryRef () const
	Fetch pointer to feature geometry. More...

OGRGeometry *	StealGeometry () CPL_WARN_UNUSED_RESULT
	Take away ownership of geometry. More...

int	GetGeomFieldCount () const
	Fetch number of geometry fields on this feature. More...

OGRGeomFieldDefn *	GetGeomFieldDefnRef (int iField)
	Fetch definition for this geometry field. More...

const OGRGeomFieldDefn *	GetGeomFieldDefnRef (int iField) const
	Fetch definition for this geometry field. More...

int	GetGeomFieldIndex (const char *pszName) const
	Fetch the geometry field index given geometry field name. More...

OGRGeometry *	GetGeomFieldRef (int iField)
	Fetch pointer to feature geometry. More...

const OGRGeometry *	GetGeomFieldRef (int iField) const
	Fetch pointer to feature geometry. More...

OGRGeometry *	StealGeometry (int iField)
	Take away ownership of geometry. More...

OGRGeometry *	GetGeomFieldRef (const char *pszFName)
	Fetch pointer to feature geometry. More...

const OGRGeometry *	GetGeomFieldRef (const char *pszFName) const
	Fetch pointer to feature geometry. More...

OGRErr	SetGeomFieldDirectly (int iField, OGRGeometry *)
	Set feature geometry of a specified geometry field. More...

OGRErr	SetGeomField (int iField, const OGRGeometry *)
	Set feature geometry of a specified geometry field. More...

OGRFeature *	Clone () const CPL_WARN_UNUSED_RESULT
	Duplicate feature. More...

virtual OGRBoolean	Equal (const OGRFeature *poFeature) const
	Test if two features are the same. More...

int	GetFieldCount () const
	Fetch number of fields on this feature. More...

const OGRFieldDefn *	GetFieldDefnRef (int iField) const
	Fetch definition for this field. More...

OGRFieldDefn *	GetFieldDefnRef (int iField)
	Fetch definition for this field. More...

int	GetFieldIndex (const char *pszName) const
	Fetch the field index given field name. More...

int	IsFieldSet (int iField) const
	Test if a field has ever been assigned a value or not. More...

void	UnsetField (int iField)
	Clear a field, marking it as unset. More...

bool	IsFieldNull (int iField) const
	Test if a field is null. More...

void	SetFieldNull (int iField)
	Clear a field, marking it as null. More...

bool	IsFieldSetAndNotNull (int iField) const
	Test if a field is set and not null. More...

OGRField *	GetRawFieldRef (int i)
	Fetch a pointer to the internal field value given the index. More...

const OGRField *	GetRawFieldRef (int i) const
	Fetch a pointer to the internal field value given the index. More...

int	GetFieldAsInteger (int i) const
	Fetch field value as integer. More...

GIntBig	GetFieldAsInteger64 (int i) const
	Fetch field value as integer 64 bit. More...

double	GetFieldAsDouble (int i) const
	Fetch field value as a double. More...

const char *	GetFieldAsString (int i) const
	Fetch field value as a string. More...

const int *	GetFieldAsIntegerList (int i, int *pnCount) const
	Fetch field value as a list of integers. More...

const GIntBig *	GetFieldAsInteger64List (int i, int *pnCount) const
	Fetch field value as a list of 64 bit integers. More...

const double *	GetFieldAsDoubleList (int i, int *pnCount) const
	Fetch field value as a list of doubles. More...

char **	GetFieldAsStringList (int i) const
	Fetch field value as a list of strings. More...

GByte *	GetFieldAsBinary (int i, int *pnCount) const
	Fetch field value as binary data. More...

int	GetFieldAsDateTime (int i, int pnYear, int pnMonth, int pnDay, int pnHour, int pnMinute, int pnSecond, int *pnTZFlag) const
	Fetch field value as date and time. More...

int	GetFieldAsDateTime (int i, int pnYear, int pnMonth, int pnDay, int pnHour, int pnMinute, float pfSecond, int *pnTZFlag) const
	Fetch field value as date and time. More...

char *	GetFieldAsSerializedJSon (int i) const
	Fetch field value as a serialized JSon object. More...

int	GetFieldAsInteger (const char *pszFName) const
	Fetch field value as integer. More...

GIntBig	GetFieldAsInteger64 (const char *pszFName) const
	Fetch field value as integer 64 bit. More...

double	GetFieldAsDouble (const char *pszFName) const
	Fetch field value as a double. More...

const char *	GetFieldAsString (const char *pszFName) const
	Fetch field value as a string. More...

const int *	GetFieldAsIntegerList (const char pszFName, int pnCount) const
	Fetch field value as a list of integers. More...

const GIntBig *	GetFieldAsInteger64List (const char pszFName, int pnCount) const
	Fetch field value as a list of 64 bit integers. More...

const double *	GetFieldAsDoubleList (const char pszFName, int pnCount) const
	Fetch field value as a list of doubles. More...

char **	GetFieldAsStringList (const char *pszFName) const
	Fetch field value as a list of strings. More...

void	SetField (int i, int nValue)
	Set field to integer value. More...

void	SetField (int i, GIntBig nValue)
	Set field to 64 bit integer value. More...

void	SetField (int i, double dfValue)
	Set field to double value. More...

void	SetField (int i, const char *pszValue)
	Set field to string value. More...

void	SetField (int i, int nCount, const int *panValues)
	Set field to list of integers value. More...

void	SetField (int i, int nCount, const GIntBig *panValues)
	Set field to list of 64 bit integers value. More...

void	SetField (int i, int nCount, const double *padfValues)
	Set field to list of doubles value. More...

void	SetField (int i, const char const papszValues)
	Set field to list of strings value. More...

void	SetField (int i, OGRField *puValue)
	Set field. More...

void	SetField (int i, int nCount, GByte *pabyBinary)
	Set field to binary data. More...

void	SetField (int i, int nYear, int nMonth, int nDay, int nHour=0, int nMinute=0, float fSecond=0.f, int nTZFlag=0)
	Set field to date. More...

void	SetField (const char *pszFName, int nValue)
	Set field to integer value. More...

void	SetField (const char *pszFName, GIntBig nValue)
	Set field to 64 bit integer value. More...

void	SetField (const char *pszFName, double dfValue)
	Set field to double value. More...

void	SetField (const char pszFName, const char pszValue)
	Set field to string value. More...

void	SetField (const char pszFName, int nCount, const int panValues)
	Set field to list of integers value. More...

void	SetField (const char pszFName, int nCount, const GIntBig panValues)
	Set field to list of 64 bit integers value. More...

void	SetField (const char pszFName, int nCount, const double padfValues)
	Set field to list of doubles value. More...

void	SetField (const char pszFName, const char const *papszValues)
	Set field to list of strings value. More...

void	SetField (const char pszFName, OGRField puValue)
	Set field. More...

void	SetField (const char *pszFName, int nYear, int nMonth, int nDay, int nHour=0, int nMinute=0, float fSecond=0.f, int nTZFlag=0)
	Set field to date. More...

GIntBig	GetFID () const
	Get feature identifier. More...

virtual OGRErr	SetFID (GIntBig nFIDIn)
	Set the feature identifier. More...

void	DumpReadable (FILE , char *papszOptions=nullptr) const
	Dump this feature in a human readable form. More...

OGRErr	SetFrom (const OGRFeature *, int=TRUE)
	Set one feature from another. More...

OGRErr	SetFrom (const OGRFeature , const int , int=TRUE)
	Set one feature from another. More...

OGRErr	SetFieldsFrom (const OGRFeature , const int , int=TRUE)
	Set fields from another feature. More...

int	Validate (int nValidateFlags, int bEmitError) const
	Validate that a feature meets constraints of its schema. More...

void	FillUnsetWithDefault (int bNotNullableOnly, char **papszOptions)
	Fill unset fields with default values that might be defined. More...

virtual const char *	GetStyleString () const
	Fetch style string for this feature. More...

virtual void	SetStyleString (const char *)
	Set feature style string. More...

virtual void	SetStyleStringDirectly (char *)
	Set feature style string. More...

virtual OGRStyleTable *	GetStyleTable () const
	Return style table. More...

virtual void	SetStyleTable (OGRStyleTable *poStyleTable)
	Set style table. More...

virtual void	SetStyleTableDirectly (OGRStyleTable *poStyleTable)
	Set style table. More...

const char *	GetNativeData () const
	Returns the native data for the feature. More...

const char *	GetNativeMediaType () const
	Returns the native media type for the feature. More...

void	SetNativeData (const char *pszNativeData)
	Sets the native data for the feature. More...

void	SetNativeMediaType (const char *pszNativeMediaType)
	Sets the native media type for the feature. More...

Static Public Member Functions
static OGRFeature *	CreateFeature (OGRFeatureDefn *)
	Feature factory. More...

static void	DestroyFeature (OGRFeature *)
	Destroy feature. More...

static OGRFeatureH	ToHandle (OGRFeature *poFeature)
	Convert a OGRFeature* to a OGRFeatureH. More...

static OGRFeature *	FromHandle (OGRFeatureH hFeature)
	Convert a OGRFeatureH to a OGRFeature*. More...

Protected Member Functions
bool	CopySelfTo (OGRFeature *poNew) const
	Copies the innards of this OGRFeature into the supplied object. More...

Detailed Description

A simple feature, including geometry and attributes.

Constructor & Destructor Documentation

◆ OGRFeature()

OGRFeature::OGRFeature ( OGRFeatureDefn * poDefnIn )

explicit

Constructor.

Note that the OGRFeature will increment the reference count of its defining OGRFeatureDefn. Destruction of the OGRFeatureDefn before destruction of all OGRFeatures that depend on it is likely to result in a crash.

This method is the same as the C function OGR_F_Create().

Parameters

poDefnIn feature class (layer) definition to which the feature will adhere.

Member Function Documentation

◆ begin()

OGRFeature::ConstFieldIterator OGRFeature::begin ( ) const

Return begin of field value iterator.

Using this iterator for standard range-based loops is safe, but due to implementation limitations, you shouldn't try to access (dereference) more than one iterator step at a time, since you will get a reference to the same object (FieldValue) at each iteration step.

for( auto&& oField: poFeature )
{
     std::cout << oField.GetIndex() << "," << oField.GetName()<< ": " << oField.GetAsString() << std::endl;
}

Since: GDAL 2.3

◆ Clone()

OGRFeature * OGRFeature::Clone ( ) const

Duplicate feature.

The newly created feature is owned by the caller, and will have its own reference to the OGRFeatureDefn.

This method is the same as the C function OGR_F_Clone().

Returns: new feature, exactly matching this feature. Or, starting with GDAL 2.1, NULL in case of out of memory situation.

◆ CopySelfTo()

bool OGRFeature::CopySelfTo ( OGRFeature * poNew ) const

protected

Copies the innards of this OGRFeature into the supplied object.

This is mainly intended to allow derived classes to implement their own Clone functions.

Parameters

poNew The object into which to copy the data of this object.

Returns: True if successful, false if the copy failed.

◆ CreateFeature()

OGRFeature * OGRFeature::CreateFeature ( OGRFeatureDefn * poDefn )

static

Feature factory.

This is essentially a feature factory, useful for applications creating features but wanting to ensure they are created out of the OGR/GDAL heap.

This method is the same as the C function OGR_F_Create().

Parameters

poDefn Feature definition defining schema.

Returns: new feature object with null fields and no geometry, or, starting with GDAL 2.1, NULL in case of out of memory situation. May be deleted with DestroyFeature().

◆ DestroyFeature()

void OGRFeature::DestroyFeature ( OGRFeature * poFeature )

static

Destroy feature.

The feature is deleted, but within the context of the GDAL/OGR heap. This is necessary when higher level applications use GDAL/OGR from a DLL and they want to delete a feature created within the DLL. If the delete is done in the calling application the memory will be freed onto the application heap which is inappropriate.

This method is the same as the C function OGR_F_Destroy().

Parameters

poFeature the feature to delete.

◆ DumpReadable()

void OGRFeature::DumpReadable	(	FILE *	fpOut,
		char **	papszOptions = `nullptr`
	)		const

Dump this feature in a human readable form.

This dumps the attributes, and geometry; however, it doesn't definition information (other than field types and names), nor does it report the geometry spatial reference system.

A few options can be defined to change the default dump :

DISPLAY_FIELDS=NO : to hide the dump of the attributes
DISPLAY_STYLE=NO : to hide the dump of the style string
DISPLAY_GEOMETRY=NO : to hide the dump of the geometry
DISPLAY_GEOMETRY=SUMMARY : to get only a summary of the geometry

This method is the same as the C function OGR_F_DumpReadable().

Parameters

fpOut	the stream to write to, such as stdout. If NULL stdout will be used.
papszOptions	NULL terminated list of options (may be NULL)

◆ end()

OGRFeature::ConstFieldIterator OGRFeature::end ( ) const

Return end of field value iterator.

◆ Equal()

OGRBoolean OGRFeature::Equal ( const OGRFeature * poFeature ) const

virtual

Test if two features are the same.

Two features are considered equal if the share them (pointer equality) same OGRFeatureDefn, have the same field values, and the same geometry (as tested by OGRGeometry::Equal()) as well as the same feature id.

This method is the same as the C function OGR_F_Equal().

Parameters

poFeature the other feature to test this one against.

Returns: TRUE if they are equal, otherwise FALSE.

◆ FillUnsetWithDefault()

void OGRFeature::FillUnsetWithDefault	(	int	bNotNullableOnly,
		char **	papszOptions
	)

Fill unset fields with default values that might be defined.

This method is the same as the C function OGR_F_FillUnsetWithDefault().

Parameters

bNotNullableOnly	if we should fill only unset fields with a not-null constraint.
papszOptions	unused currently. Must be set to NULL.

Since: GDAL 2.0

◆ FromHandle()

static OGRFeature* OGRFeature::FromHandle ( OGRFeatureH hFeature )

inlinestatic

Convert a OGRFeatureH to a OGRFeature*.

Since: GDAL 2.3

◆ GetDefnRef() [1/2]

OGRFeatureDefn * OGRFeature::GetDefnRef ( )

inline

Fetch feature definition.

This method is the same as the C function OGR_F_GetDefnRef().

Returns: a reference to the feature definition object.

◆ GetDefnRef() [2/2]

const OGRFeatureDefn * OGRFeature::GetDefnRef ( ) const

inline

Fetch feature definition.

This method is the same as the C function OGR_F_GetDefnRef().

Returns: a reference to the feature definition object.

Since: GDAL 2.3

◆ GetFID()

GIntBig OGRFeature::GetFID ( ) const

inline

Get feature identifier.

This method is the same as the C function OGR_F_GetFID(). Note: since GDAL 2.0, this method returns a GIntBig (previously a long)

Returns: feature id or OGRNullFID if none has been assigned.

◆ GetFieldAsBinary()

GByte * OGRFeature::GetFieldAsBinary	(	int	iField,
		int *	pnBytes
	)		const

Fetch field value as binary data.

This method only works for OFTBinary and OFTString fields.

This method is the same as the C function OGR_F_GetFieldAsBinary().

Parameters

iField	the field to fetch, from 0 to GetFieldCount()-1.
pnBytes	location to put the number of bytes returned.

Returns: the field value. This data is internal, and should not be modified, or freed. Its lifetime may be very brief.

◆ GetFieldAsDateTime() [1/2]

int OGRFeature::GetFieldAsDateTime	(	int	iField,
		int *	pnYear,
		int *	pnMonth,
		int *	pnDay,
		int *	pnHour,
		int *	pnMinute,
		int *	pnSecond,
		int *	pnTZFlag
	)		const

Fetch field value as date and time.

Currently this method only works for OFTDate, OFTTime and OFTDateTime fields.

This method is the same as the C function OGR_F_GetFieldAsDateTime().

Parameters

iField	the field to fetch, from 0 to GetFieldCount()-1.
pnYear	(including century)
pnMonth	(1-12)
pnDay	(1-31)
pnHour	(0-23)
pnMinute	(0-59)
pnSecond	(0-59)
pnTZFlag	(0=unknown, 1=localtime, 100=GMT, see data model for details)

Returns: TRUE on success or FALSE on failure.

◆ GetFieldAsDateTime() [2/2]

int OGRFeature::GetFieldAsDateTime	(	int	iField,
		int *	pnYear,
		int *	pnMonth,
		int *	pnDay,
		int *	pnHour,
		int *	pnMinute,
		float *	pfSecond,
		int *	pnTZFlag
	)		const

Fetch field value as date and time.

Currently this method only works for OFTDate, OFTTime and OFTDateTime fields.

This method is the same as the C function OGR_F_GetFieldAsDateTime().

Parameters

iField	the field to fetch, from 0 to GetFieldCount()-1.
pnYear	(including century)
pnMonth	(1-12)
pnDay	(1-31)
pnHour	(0-23)
pnMinute	(0-59)
pfSecond	(0-59 with millisecond accuracy)
pnTZFlag	(0=unknown, 1=localtime, 100=GMT, see data model for details)

Returns: TRUE on success or FALSE on failure.

◆ GetFieldAsDouble() [1/2]

double OGRFeature::GetFieldAsDouble ( int iField ) const

Fetch field value as a double.

OFTString features will be translated using CPLAtof(). OFTInteger and OFTInteger64 fields will be cast to double. Other field types, or errors will result in a return value of zero.

This method is the same as the C function OGR_F_GetFieldAsDouble().

Parameters

iField the field to fetch, from 0 to GetFieldCount()-1.

Returns: the field value.

◆ GetFieldAsDouble() [2/2]

OGRFeature::GetFieldAsDouble ( const char * pszFName ) const

inline

Fetch field value as a double.

OFTString features will be translated using CPLAtof(). OFTInteger and OFTInteger64 fields will be cast to double. Other field types, or errors will result in a return value of zero.

Parameters

pszFName the name of the field to fetch.

Returns: the field value.

◆ GetFieldAsDoubleList() [1/2]

const double * OGRFeature::GetFieldAsDoubleList	(	int	iField,
		int *	pnCount
	)		const

Fetch field value as a list of doubles.

Currently this method only works for OFTRealList fields.

This method is the same as the C function OGR_F_GetFieldAsDoubleList().

Parameters

iField	the field to fetch, from 0 to GetFieldCount()-1.
pnCount	an integer to put the list count (number of doubles) into.

Returns: the field value. This list is internal, and should not be modified, or freed. Its lifetime may be very brief. If *pnCount is zero on return the returned pointer may be NULL or non-NULL.

◆ GetFieldAsDoubleList() [2/2]

OGRFeature::GetFieldAsDoubleList	(	const char *	pszFName,
		int *	pnCount
	)		const

inline

Fetch field value as a list of doubles.

Currently this method only works for OFTRealList fields.

Parameters

pszFName	the name of the field to fetch.
pnCount	an integer to put the list count (number of doubles) into.

Returns: the field value. This list is internal, and should not be modified, or freed. Its lifetime may be very brief. If *pnCount is zero on return the returned pointer may be NULL or non-NULL.

◆ GetFieldAsInteger() [1/2]

int OGRFeature::GetFieldAsInteger ( int iField ) const

Fetch field value as integer.

OFTString features will be translated using atoi(). OFTReal fields will be cast to integer. OFTInteger64 are demoted to 32 bit, with clamping if out-of-range. Other field types, or errors will result in a return value of zero.

This method is the same as the C function OGR_F_GetFieldAsInteger().

Parameters

iField the field to fetch, from 0 to GetFieldCount()-1.

Returns: the field value.

◆ GetFieldAsInteger() [2/2]

OGRFeature::GetFieldAsInteger ( const char * pszFName ) const

inline

Fetch field value as integer.

OFTString features will be translated using atoi(). OFTReal fields will be cast to integer. OFTInteger64 are demoted to 32 bit, with clamping if out-of-range. Other field types, or errors will result in a return value of zero.

Parameters

pszFName the name of the field to fetch.

Returns: the field value.

◆ GetFieldAsInteger64() [1/2]

GIntBig OGRFeature::GetFieldAsInteger64 ( int iField ) const

Fetch field value as integer 64 bit.

OFTInteger are promoted to 64 bit. OFTString features will be translated using CPLAtoGIntBig(). OFTReal fields will be cast to integer. Other field types, or errors will result in a return value of zero.

This method is the same as the C function OGR_F_GetFieldAsInteger64().

Parameters

iField the field to fetch, from 0 to GetFieldCount()-1.

Returns: the field value.

Since: GDAL 2.0

◆ GetFieldAsInteger64() [2/2]

OGRFeature::GetFieldAsInteger64 ( const char * pszFName ) const

inline

Fetch field value as integer 64 bit.

OFTInteger are promoted to 64 bit. OFTString features will be translated using CPLAtoGIntBig(). OFTReal fields will be cast to integer. Other field types, or errors will result in a return value of zero.

Parameters

pszFName the name of the field to fetch.

Returns: the field value.

◆ GetFieldAsInteger64List() [1/2]

const GIntBig * OGRFeature::GetFieldAsInteger64List	(	int	iField,
		int *	pnCount
	)		const

Fetch field value as a list of 64 bit integers.

Currently this method only works for OFTInteger64List fields.

This method is the same as the C function OGR_F_GetFieldAsInteger64List().

Parameters

iField	the field to fetch, from 0 to GetFieldCount()-1.
pnCount	an integer to put the list count (number of integers) into.

Returns: the field value. This list is internal, and should not be modified, or freed. Its lifetime may be very brief. If *pnCount is zero on return the returned pointer may be NULL or non-NULL.

Since: GDAL 2.0

◆ GetFieldAsInteger64List() [2/2]

OGRFeature::GetFieldAsInteger64List	(	const char *	pszFName,
		int *	pnCount
	)		const

inline

Fetch field value as a list of 64 bit integers.

Currently this method only works for OFTInteger64List fields.

Parameters

pszFName	the name of the field to fetch.
pnCount	an integer to put the list count (number of integers) into.

Returns: the field value. This list is internal, and should not be modified, or freed. Its lifetime may be very brief. If *pnCount is zero on return the returned pointer may be NULL or non-NULL.

Since: GDAL 2.0

◆ GetFieldAsIntegerList() [1/2]

const int * OGRFeature::GetFieldAsIntegerList	(	int	iField,
		int *	pnCount
	)		const

Fetch field value as a list of integers.

Currently this method only works for OFTIntegerList fields.

This method is the same as the C function OGR_F_GetFieldAsIntegerList().

Parameters

iField	the field to fetch, from 0 to GetFieldCount()-1.
pnCount	an integer to put the list count (number of integers) into.

Returns: the field value. This list is internal, and should not be modified, or freed. Its lifetime may be very brief. If *pnCount is zero on return the returned pointer may be NULL or non-NULL.

◆ GetFieldAsIntegerList() [2/2]

OGRFeature::GetFieldAsIntegerList	(	const char *	pszFName,
		int *	pnCount
	)		const

inline

Fetch field value as a list of integers.

Currently this method only works for OFTIntegerList fields.

Parameters

pszFName	the name of the field to fetch.
pnCount	an integer to put the list count (number of integers) into.

Returns: the field value. This list is internal, and should not be modified, or freed. Its lifetime may be very brief. If *pnCount is zero on return the returned pointer may be NULL or non-NULL. OFTReal and OFTInteger fields will be translated to string using sprintf(), but not necessarily using the established formatting rules. Other field types, or errors will result in a return value of zero.

◆ GetFieldAsSerializedJSon()

char * OGRFeature::GetFieldAsSerializedJSon ( int iField ) const

Fetch field value as a serialized JSon object.

Currently this method only works for OFTStringList, OFTIntegerList, OFTInteger64List and OFTRealList

Parameters

iField the field to fetch, from 0 to GetFieldCount()-1.

Returns: a string that must be de-allocate with CPLFree()

Since: GDAL 2.2

◆ GetFieldAsString() [1/2]

const char * OGRFeature::GetFieldAsString ( int iField ) const

Fetch field value as a string.

OFTReal and OFTInteger fields will be translated to string using sprintf(), but not necessarily using the established formatting rules. Other field types, or errors will result in a return value of zero.

This method is the same as the C function OGR_F_GetFieldAsString().

Parameters

iField the field to fetch, from 0 to GetFieldCount()-1.

Returns: the field value. This string is internal, and should not be modified, or freed. Its lifetime may be very brief.

◆ GetFieldAsString() [2/2]

OGRFeature::GetFieldAsString ( const char * pszFName ) const

inline

Fetch field value as a string.

OFTReal and OFTInteger fields will be translated to string using sprintf(), but not necessarily using the established formatting rules. Other field types, or errors will result in a return value of zero.

Parameters

pszFName the name of the field to fetch.

Returns: the field value. This string is internal, and should not be modified, or freed. Its lifetime may be very brief.

◆ GetFieldAsStringList() [1/2]

char ** OGRFeature::GetFieldAsStringList ( int iField ) const

Fetch field value as a list of strings.

Currently this method only works for OFTStringList fields.

The returned list is terminated by a NULL pointer. The number of elements can also be calculated using CSLCount().

This method is the same as the C function OGR_F_GetFieldAsStringList().

Parameters

iField the field to fetch, from 0 to GetFieldCount()-1.

Returns: the field value. This list is internal, and should not be modified, or freed. Its lifetime may be very brief.

◆ GetFieldAsStringList() [2/2]

OGRFeature::GetFieldAsStringList ( const char * pszFName ) const

inline

Fetch field value as a list of strings.

Currently this method only works for OFTStringList fields.

The returned list is terminated by a NULL pointer. The number of elements can also be calculated using CSLCount().

Parameters

pszFName the name of the field to fetch.

Returns: the field value. This list is internal, and should not be modified, or freed. Its lifetime may be very brief.

◆ GetFieldCount()

int OGRFeature::GetFieldCount ( ) const

inline

Fetch number of fields on this feature.

This will always be the same as the field count for the OGRFeatureDefn.

This method is the same as the C function OGR_F_GetFieldCount().

Returns: count of fields.

◆ GetFieldDefnRef() [1/2]

const OGRFieldDefn * OGRFeature::GetFieldDefnRef ( int iField ) const

inline

Fetch definition for this field.

This method is the same as the C function OGR_F_GetFieldDefnRef().

Parameters

iField the field to fetch, from 0 to GetFieldCount()-1.

Returns: the field definition (from the OGRFeatureDefn). This is an internal reference, and should not be deleted or modified.

Since: GDAL 2.3

◆ GetFieldDefnRef() [2/2]

OGRFieldDefn * OGRFeature::GetFieldDefnRef ( int iField )

inline

Fetch definition for this field.

This method is the same as the C function OGR_F_GetFieldDefnRef().

Parameters

iField the field to fetch, from 0 to GetFieldCount()-1.

Returns: the field definition (from the OGRFeatureDefn). This is an internal reference, and should not be deleted or modified.

◆ GetFieldIndex()

int OGRFeature::GetFieldIndex ( const char * pszName ) const

inline

Fetch the field index given field name.

This is a cover for the OGRFeatureDefn::GetFieldIndex() method.

This method is the same as the C function OGR_F_GetFieldIndex().

Parameters

pszName the name of the field to search for.

Returns: the field index, or -1 if no matching field is found.

◆ GetGeometryRef() [1/2]

OGRGeometry * OGRFeature::GetGeometryRef ( )

Fetch pointer to feature geometry.

This method is essentially the same as the C function OGR_F_GetGeometryRef(). (the only difference is that the C function honours OGRGetNonLinearGeometriesEnabledFlag())

Starting with GDAL 1.11, this is equivalent to calling OGRFeature::GetGeomFieldRef(0).

Returns: pointer to internal feature geometry. This object should not be modified.

◆ GetGeometryRef() [2/2]

const OGRGeometry * OGRFeature::GetGeometryRef ( ) const

Fetch pointer to feature geometry.

This method is essentially the same as the C function OGR_F_GetGeometryRef(). (the only difference is that the C function honours OGRGetNonLinearGeometriesEnabledFlag())

Returns: pointer to internal feature geometry. This object should not be modified.

Since: GDAL 2.3

◆ GetGeomFieldCount()

int OGRFeature::GetGeomFieldCount ( ) const

inline

Fetch number of geometry fields on this feature.

This will always be the same as the geometry field count for the OGRFeatureDefn.

This method is the same as the C function OGR_F_GetGeomFieldCount().

Returns: count of geometry fields.

Since: GDAL 1.11

◆ GetGeomFieldDefnRef() [1/2]

OGRGeomFieldDefn * OGRFeature::GetGeomFieldDefnRef ( int iGeomField )

inline

Fetch definition for this geometry field.

This method is the same as the C function OGR_F_GetGeomFieldDefnRef().

Parameters

iGeomField the field to fetch, from 0 to GetGeomFieldCount()-1.

Returns: the field definition (from the OGRFeatureDefn). This is an internal reference, and should not be deleted or modified.

Since: GDAL 1.11

◆ GetGeomFieldDefnRef() [2/2]

const OGRGeomFieldDefn * OGRFeature::GetGeomFieldDefnRef ( int iGeomField ) const

inline

Fetch definition for this geometry field.

This method is the same as the C function OGR_F_GetGeomFieldDefnRef().

Parameters

iGeomField the field to fetch, from 0 to GetGeomFieldCount()-1.

Returns: the field definition (from the OGRFeatureDefn). This is an internal reference, and should not be deleted or modified.

Since: GDAL 2.3

◆ GetGeomFieldIndex()

int OGRFeature::GetGeomFieldIndex ( const char * pszName ) const

inline

Fetch the geometry field index given geometry field name.

This is a cover for the OGRFeatureDefn::GetGeomFieldIndex() method.

This method is the same as the C function OGR_F_GetGeomFieldIndex().

Parameters

pszName the name of the geometry field to search for.

Returns: the geometry field index, or -1 if no matching geometry field is found.

Since: GDAL 1.11

◆ GetGeomFieldRef() [1/4]

OGRGeometry * OGRFeature::GetGeomFieldRef ( int iField )

Fetch pointer to feature geometry.

This method is the same as the C function OGR_F_GetGeomFieldRef().

Parameters

iField geometry field to get.

Returns: pointer to internal feature geometry. This object should not be modified.

Since: GDAL 1.11

◆ GetGeomFieldRef() [2/4]

const OGRGeometry * OGRFeature::GetGeomFieldRef ( int iField ) const

Fetch pointer to feature geometry.

This method is the same as the C function OGR_F_GetGeomFieldRef().

Parameters

iField geometry field to get.

Returns: pointer to internal feature geometry. This object should not be modified.

Since: GDAL 2.3

◆ GetGeomFieldRef() [3/4]

OGRGeometry * OGRFeature::GetGeomFieldRef ( const char * pszFName )

Fetch pointer to feature geometry.

Parameters

pszFName name of geometry field to get.

Returns: pointer to internal feature geometry. This object should not be modified.

Since: GDAL 1.11

◆ GetGeomFieldRef() [4/4]

const OGRGeometry * OGRFeature::GetGeomFieldRef ( const char * pszFName ) const

Fetch pointer to feature geometry.

Parameters

pszFName name of geometry field to get.

Returns: pointer to internal feature geometry. This object should not be modified.

Since: GDAL 2.3

◆ GetNativeData()

const char * OGRFeature::GetNativeData ( ) const

inline

Returns the native data for the feature.

The native data is the representation in a "natural" form that comes from the driver that created this feature, or that is aimed at an output driver. The native data may be in different format, which is indicated by GetNativeMediaType().

Note that most drivers do not support storing the native data in the feature object, and if they do, generally the NATIVE_DATA open option must be passed at dataset opening.

The "native data" does not imply it is something more performant or powerful than what can be obtained with the rest of the API, but it may be useful in round-tripping scenarios where some characteristics of the underlying format are not captured otherwise by the OGR abstraction.

This function is the same as the C function OGR_F_GetNativeData().

Returns: a string with the native data, or NULL if there is none.

Since: GDAL 2.1

See also: https://trac.osgeo.org/gdal/wiki/rfc60_improved_roundtripping_in_ogr

◆ GetNativeMediaType()

const char * OGRFeature::GetNativeMediaType ( ) const

inline

Returns the native media type for the feature.

The native media type is the identifier for the format of the native data. It follows the IANA RFC 2045 (see https://en.wikipedia.org/wiki/Media_type), e.g. "application/vnd.geo+json" for JSon.

This function is the same as the C function OGR_F_GetNativeMediaType().

Returns: a string with the native media type, or NULL if there is none.

Since: GDAL 2.1

See also: https://trac.osgeo.org/gdal/wiki/rfc60_improved_roundtripping_in_ogr

◆ GetRawFieldRef() [1/2]

OGRField * OGRFeature::GetRawFieldRef ( int iField )

inline

Fetch a pointer to the internal field value given the index.

This method is the same as the C function OGR_F_GetRawFieldRef().

Parameters

iField the field to fetch, from 0 to GetFieldCount()-1.

Returns: the returned pointer is to an internal data structure, and should not be freed, or modified.

◆ GetRawFieldRef() [2/2]

const OGRField * OGRFeature::GetRawFieldRef ( int iField ) const

inline

Fetch a pointer to the internal field value given the index.

This method is the same as the C function OGR_F_GetRawFieldRef().

Parameters

iField the field to fetch, from 0 to GetFieldCount()-1.

Returns: the returned pointer is to an internal data structure, and should not be freed, or modified.

Since: GDAL 2.3

◆ GetStyleString()

const char * OGRFeature::GetStyleString ( ) const

virtual

Fetch style string for this feature.

Set the OGR Feature Style Specification for details on the format of this string, and ogr_featurestyle.h for services available to parse it.

This method is the same as the C function OGR_F_GetStyleString().

Returns: a reference to a representation in string format, or NULL if there isn't one.

◆ GetStyleTable()

virtual OGRStyleTable* OGRFeature::GetStyleTable ( ) const

inlinevirtual

Return style table.

Returns: style table.

◆ IsFieldNull()

bool OGRFeature::IsFieldNull ( int iField ) const

Test if a field is null.

This method is the same as the C function OGR_F_IsFieldNull().

Parameters

iField the field to test.

Returns: TRUE if the field is null, otherwise false.

Since: GDAL 2.2

◆ IsFieldSet()

int OGRFeature::IsFieldSet ( int iField ) const

Test if a field has ever been assigned a value or not.

This method is the same as the C function OGR_F_IsFieldSet().

Parameters

iField the field to test.

Returns: TRUE if the field has been set, otherwise false.

◆ IsFieldSetAndNotNull()

bool OGRFeature::IsFieldSetAndNotNull ( int iField ) const

Test if a field is set and not null.

This method is the same as the C function OGR_F_IsFieldSetAndNotNull().

Parameters

iField the field to test.

Returns: TRUE if the field is set and not null, otherwise false.

Since: GDAL 2.2

◆ operator[]() [1/4]

const OGRFeature::FieldValue OGRFeature::operator[] ( int iField ) const

Return a field value.

Parameters

iField the field to fetch, from 0 to GetFieldCount()-1. This is not checked by the method !

Returns: the field value.

Since: GDAL 2.3

◆ operator[]() [2/4]

OGRFeature::FieldValue OGRFeature::operator[] ( int iField )

Return a field value.

Parameters

iField the field to fetch, from 0 to GetFieldCount()-1. This is not checked by the method !

Returns: the field value.

Since: GDAL 2.3

◆ operator[]() [3/4]

const OGRFeature::FieldValue OGRFeature::operator[] ( const char * pszFieldName ) const

Return a field value.

Parameters

pszFieldName field name

Returns: the field value, or throw a FieldNotFoundException if not found.

Since: GDAL 2.3

◆ operator[]() [4/4]

OGRFeature::FieldValue OGRFeature::operator[] ( const char * pszFieldName )

Return a field value.

Parameters

pszFieldName field name

Returns: the field value, or throw a FieldNotFoundException if not found.

Since: GDAL 2.3

◆ SetFID()

OGRErr OGRFeature::SetFID ( GIntBig nFIDIn )

virtual

Set the feature identifier.

For specific types of features this operation may fail on illegal features ids. Generally it always succeeds. Feature ids should be greater than or equal to zero, with the exception of OGRNullFID (-1) indicating that the feature id is unknown.

This method is the same as the C function OGR_F_SetFID().

Parameters

nFIDIn the new feature identifier value to assign.

Returns: On success OGRERR_NONE, or on failure some other value.

◆ SetField() [1/21]

void OGRFeature::SetField	(	int	iField,
		int	nValue
	)

Set field to integer value.

OFTInteger, OFTInteger64 and OFTReal fields will be set directly. OFTString fields will be assigned a string representation of the value, but not necessarily taking into account formatting constraints on this field. Other field types may be unaffected.

This method is the same as the C function OGR_F_SetFieldInteger().

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

iField	the field to fetch, from 0 to GetFieldCount()-1.
nValue	the value to assign.

◆ SetField() [2/21]

void OGRFeature::SetField	(	int	iField,
		GIntBig	nValue
	)

Set field to 64 bit integer value.

OFTInteger, OFTInteger64 and OFTReal fields will be set directly. OFTString fields will be assigned a string representation of the value, but not necessarily taking into account formatting constraints on this field. Other field types may be unaffected.

This method is the same as the C function OGR_F_SetFieldInteger64().

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

iField	the field to fetch, from 0 to GetFieldCount()-1.
nValue	the value to assign.

Since: GDAL 2.0

◆ SetField() [3/21]

void OGRFeature::SetField	(	int	iField,
		double	dfValue
	)

Set field to double value.

OFTInteger, OFTInteger64 and OFTReal fields will be set directly. OFTString fields will be assigned a string representation of the value, but not necessarily taking into account formatting constraints on this field. Other field types may be unaffected.

This method is the same as the C function OGR_F_SetFieldDouble().

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

iField	the field to fetch, from 0 to GetFieldCount()-1.
dfValue	the value to assign.

◆ SetField() [4/21]

void OGRFeature::SetField	(	int	iField,
		const char *	pszValue
	)

Set field to string value.

OFTInteger fields will be set based on an atoi() conversion of the string. OFTInteger64 fields will be set based on an CPLAtoGIntBig() conversion of the string. OFTReal fields will be set based on an CPLAtof() conversion of the string. Other field types may be unaffected.

This method is the same as the C function OGR_F_SetFieldString().

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

iField	the field to fetch, from 0 to GetFieldCount()-1.
pszValue	the value to assign.

◆ SetField() [5/21]

void OGRFeature::SetField	(	int	iField,
		int	nCount,
		const int *	panValues
	)

Set field to list of integers value.

This method currently on has an effect of OFTIntegerList, OFTInteger64List and OFTRealList fields.

This method is the same as the C function OGR_F_SetFieldIntegerList().

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

iField	the field to set, from 0 to GetFieldCount()-1.
nCount	the number of values in the list being assigned.
panValues	the values to assign.

◆ SetField() [6/21]

void OGRFeature::SetField	(	int	iField,
		int	nCount,
		const GIntBig *	panValues
	)

Set field to list of 64 bit integers value.

This method currently on has an effect of OFTIntegerList, OFTInteger64List and OFTRealList fields.

This method is the same as the C function OGR_F_SetFieldIntege64rList().

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

iField	the field to set, from 0 to GetFieldCount()-1.
nCount	the number of values in the list being assigned.
panValues	the values to assign.

Since: GDAL 2.0

◆ SetField() [7/21]

void OGRFeature::SetField	(	int	iField,
		int	nCount,
		const double *	padfValues
	)

Set field to list of doubles value.

This method currently on has an effect of OFTIntegerList, OFTInteger64List, OFTRealList fields.

This method is the same as the C function OGR_F_SetFieldDoubleList().

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

iField	the field to set, from 0 to GetFieldCount()-1.
nCount	the number of values in the list being assigned.
padfValues	the values to assign.

◆ SetField() [8/21]

void OGRFeature::SetField	(	int	iField,
		const char const	papszValues
	)

Set field to list of strings value.

This method currently on has an effect of OFTStringList fields.

This method is the same as the C function OGR_F_SetFieldStringList().

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

iField	the field to set, from 0 to GetFieldCount()-1.
papszValues	the values to assign.

◆ SetField() [9/21]

void OGRFeature::SetField	(	int	iField,
		OGRField *	puValue
	)

Set field.

The passed value OGRField must be of exactly the same type as the target field, or an application crash may occur. The passed value is copied, and will not be affected. It remains the responsibility of the caller.

This method is the same as the C function OGR_F_SetFieldRaw().

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

iField	the field to fetch, from 0 to GetFieldCount()-1.
puValue	the value to assign.

◆ SetField() [10/21]

void OGRFeature::SetField	(	int	iField,
		int	nBytes,
		GByte *	pabyData
	)

Set field to binary data.

This method currently on has an effect of OFTBinary fields.

This method is the same as the C function OGR_F_SetFieldBinary().

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

iField	the field to set, from 0 to GetFieldCount()-1.
nBytes	bytes of data being set.
pabyData	the raw data being applied.

◆ SetField() [11/21]

void OGRFeature::SetField	(	int	iField,
		int	nYear,
		int	nMonth,
		int	nDay,
		int	nHour = `0`,
		int	nMinute = `0`,
		float	fSecond = `0.f`,
		int	nTZFlag = `0`
	)

Set field to date.

This method currently only has an effect for OFTDate, OFTTime and OFTDateTime fields.

This method is the same as the C function OGR_F_SetFieldDateTime().

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

iField	the field to set, from 0 to GetFieldCount()-1.
nYear	(including century)
nMonth	(1-12)
nDay	(1-31)
nHour	(0-23)
nMinute	(0-59)
fSecond	(0-59, with millisecond accuracy)
nTZFlag	(0=unknown, 1=localtime, 100=GMT, see data model for details)

◆ SetField() [12/21]

OGRFeature::SetField	(	const char *	pszFName,
		int	nValue
	)

inline

Set field to integer value.

OFTInteger, OFTInteger64 and OFTReal fields will be set directly. OFTString fields will be assigned a string representation of the value, but not necessarily taking into account formatting constraints on this field. Other field types may be unaffected.

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

pszFName	the name of the field to set.
nValue	the value to assign.

◆ SetField() [13/21]

OGRFeature::SetField	(	const char *	pszFName,
		GIntBig	nValue
	)

inline

Set field to 64 bit integer value.

OFTInteger, OFTInteger64 and OFTReal fields will be set directly. OFTString fields will be assigned a string representation of the value, but not necessarily taking into account formatting constraints on this field. Other field types may be unaffected.

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

pszFName	the name of the field to set.
nValue	the value to assign.

◆ SetField() [14/21]

OGRFeature::SetField	(	const char *	pszFName,
		double	dfValue
	)

inline

Set field to double value.

OFTInteger, OFTInteger64 and OFTReal fields will be set directly. OFTString fields will be assigned a string representation of the value, but not necessarily taking into account formatting constraints on this field. Other field types may be unaffected.

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

pszFName	the name of the field to set.
dfValue	the value to assign.

◆ SetField() [15/21]

OGRFeature::SetField	(	const char *	pszFName,
		const char *	pszValue
	)

inline

Set field to string value.

OFTInteger fields will be set based on an atoi() conversion of the string. OFTInteger64 fields will be set based on an CPLAtoGIntBig() conversion of the string. OFTReal fields will be set based on an CPLAtof() conversion of the string. Other field types may be unaffected.

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

pszFName	the name of the field to set.
pszValue	the value to assign.

◆ SetField() [16/21]

OGRFeature::SetField	(	const char *	pszFName,
		int	nCount,
		const int *	panValues
	)

inline

Set field to list of integers value.

This method currently on has an effect of OFTIntegerList, OFTInteger64List and OFTRealList fields.

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

pszFName	the name of the field to set.
nCount	the number of values in the list being assigned.
panValues	the values to assign.

◆ SetField() [17/21]

OGRFeature::SetField	(	const char *	pszFName,
		int	nCount,
		const GIntBig *	panValues
	)

inline

Set field to list of 64 bit integers value.

This method currently on has an effect of OFTIntegerList, OFTInteger64List and OFTRealList fields.

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

pszFName	the name of the field to set.
nCount	the number of values in the list being assigned.
panValues	the values to assign.

◆ SetField() [18/21]

OGRFeature::SetField	(	const char *	pszFName,
		int	nCount,
		const double *	padfValues
	)

inline

Set field to list of doubles value.

This method currently on has an effect of OFTIntegerList, OFTInteger64List, OFTRealList fields.

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

pszFName	the name of the field to set.
nCount	the number of values in the list being assigned.
padfValues	the values to assign.

◆ SetField() [19/21]

OGRFeature::SetField	(	const char *	pszFName,
		const char const	papszValues
	)

inline

Set field to list of strings value.

This method currently on has an effect of OFTStringList fields.

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

pszFName	the name of the field to set.
papszValues	the values to assign.

◆ SetField() [20/21]

OGRFeature::SetField	(	const char *	pszFName,
		OGRField *	puValue
	)

inline

Set field.

The passed value OGRField must be of exactly the same type as the target field, or an application crash may occur. The passed value is copied, and will not be affected. It remains the responsibility of the caller.

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

pszFName	the name of the field to set.
puValue	the value to assign.

◆ SetField() [21/21]

OGRFeature::SetField	(	const char *	pszFName,
		int	nYear,
		int	nMonth,
		int	nDay,
		int	nHour = `0`,
		int	nMinute = `0`,
		float	fSecond = `0.f`,
		int	nTZFlag = `0`
	)

inline

Set field to date.

This method currently only has an effect for OFTDate, OFTTime and OFTDateTime fields.

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

pszFName	the name of the field to set.
nYear	(including century)
nMonth	(1-12)
nDay	(1-31)
nHour	(0-23)
nMinute	(0-59)
fSecond	(0-59, with millisecond accuracy)
nTZFlag	(0=unknown, 1=localtime, 100=GMT, see data model for details)

◆ SetFieldNull()

void OGRFeature::SetFieldNull ( int iField )

Clear a field, marking it as null.

This method is the same as the C function OGR_F_SetFieldNull().

Parameters

iField the field to set to null.

Since: GDAL 2.2

◆ SetFieldsFrom()

OGRErr OGRFeature::SetFieldsFrom	(	const OGRFeature *	poSrcFeature,
		const int *	panMap,
		int	bForgiving = `TRUE`
	)

Set fields from another feature.

Overwrite the fields of this feature from the attributes of another. The FID and the style string are not set. The poSrcFeature does not need to have the same OGRFeatureDefn. Field values are copied according to the provided indices map. Field types do not have to exactly match. SetField() method conversion rules will be applied as needed. This is more efficient than OGR_F_SetFrom() in that this doesn't lookup the fields by their names. Particularly useful when the field names don't match.

Parameters

poSrcFeature	the feature from which geometry, and field values will be copied.
panMap	Array of the indices of the feature's fields stored at the corresponding index of the source feature's fields. A value of -1 should be used to ignore the source's field. The array should not be NULL and be as long as the number of fields in the source feature.
bForgiving	TRUE if the operation should continue despite lacking output fields matching some of the source fields.

Returns: OGRERR_NONE if the operation succeeds, even if some values are not transferred, otherwise an error code.

◆ SetFrom() [1/2]

OGRErr OGRFeature::SetFrom	(	const OGRFeature *	poSrcFeature,
		int	bForgiving = `TRUE`
	)

Set one feature from another.

Overwrite the contents of this feature from the geometry and attributes of another. The poSrcFeature does not need to have the same OGRFeatureDefn. Field values are copied by corresponding field names. Field types do not have to exactly match. SetField() method conversion rules will be applied as needed.

This method is the same as the C function OGR_F_SetFrom().

Parameters

poSrcFeature	the feature from which geometry, and field values will be copied.
bForgiving	TRUE if the operation should continue despite lacking output fields matching some of the source fields.

Returns: OGRERR_NONE if the operation succeeds, even if some values are not transferred, otherwise an error code.

◆ SetFrom() [2/2]

OGRErr OGRFeature::SetFrom	(	const OGRFeature *	poSrcFeature,
		const int *	panMap,
		int	bForgiving = `TRUE`
	)

Set one feature from another.

Overwrite the contents of this feature from the geometry and attributes of another. The poSrcFeature does not need to have the same OGRFeatureDefn. Field values are copied according to the provided indices map. Field types do not have to exactly match. SetField() method conversion rules will be applied as needed. This is more efficient than OGR_F_SetFrom() in that this doesn't lookup the fields by their names. Particularly useful when the field names don't match.

This method is the same as the C function OGR_F_SetFromWithMap().

Parameters

poSrcFeature	the feature from which geometry, and field values will be copied.
panMap	Array of the indices of the feature's fields stored at the corresponding index of the source feature's fields. A value of -1 should be used to ignore the source's field. The array should not be NULL and be as long as the number of fields in the source feature.
bForgiving	TRUE if the operation should continue despite lacking output fields matching some of the source fields.

Returns: OGRERR_NONE if the operation succeeds, even if some values are not transferred, otherwise an error code.

◆ SetGeometry()

OGRErr OGRFeature::SetGeometry ( const OGRGeometry * poGeomIn )

Set feature geometry.

This method updates the features geometry, and operate exactly as SetGeometryDirectly(), except that this method does not assume ownership of the passed geometry, but instead makes a copy of it.

This method is the same as the C function OGR_F_SetGeometry().

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

poGeomIn new geometry to apply to feature. Passing NULL value here is correct and it will result in deallocation of currently assigned geometry without assigning new one.

Returns: OGRERR_NONE if successful, or OGR_UNSUPPORTED_GEOMETRY_TYPE if the geometry type is illegal for the OGRFeatureDefn (checking not yet implemented).

◆ SetGeometryDirectly()

OGRErr OGRFeature::SetGeometryDirectly ( OGRGeometry * poGeomIn )

Set feature geometry.

This method updates the features geometry, and operate exactly as SetGeometry(), except that this method assumes ownership of the passed geometry (even in case of failure of that function).

This method is the same as the C function OGR_F_SetGeometryDirectly().

Note: This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

poGeomIn new geometry to apply to feature. Passing NULL value here is correct and it will result in deallocation of currently assigned geometry without assigning new one.

Returns: OGRERR_NONE if successful, or OGR_UNSUPPORTED_GEOMETRY_TYPE if the geometry type is illegal for the OGRFeatureDefn (checking not yet implemented).

◆ SetGeomField()

OGRErr OGRFeature::SetGeomField	(	int	iField,
		const OGRGeometry *	poGeomIn
	)

Set feature geometry of a specified geometry field.

This method updates the features geometry, and operate exactly as SetGeomFieldDirectly(), except that this method does not assume ownership of the passed geometry, but instead makes a copy of it.

This method is the same as the C function OGR_F_SetGeomField().

Parameters

iField	geometry field to set.
poGeomIn	new geometry to apply to feature. Passing NULL value here is correct and it will result in deallocation of currently assigned geometry without assigning new one.

Returns: OGRERR_NONE if successful, or OGRERR_FAILURE if the index is invalid, or OGR_UNSUPPORTED_GEOMETRY_TYPE if the geometry type is illegal for the OGRFeatureDefn (checking not yet implemented).

Since: GDAL 1.11

◆ SetGeomFieldDirectly()

OGRErr OGRFeature::SetGeomFieldDirectly	(	int	iField,
		OGRGeometry *	poGeomIn
	)

Set feature geometry of a specified geometry field.

This method updates the features geometry, and operate exactly as SetGeomField(), except that this method assumes ownership of the passed geometry (even in case of failure of that function).

This method is the same as the C function OGR_F_SetGeomFieldDirectly().

Parameters

iField	geometry field to set.
poGeomIn	new geometry to apply to feature. Passing NULL value here is correct and it will result in deallocation of currently assigned geometry without assigning new one.

Returns: OGRERR_NONE if successful, or OGRERR_FAILURE if the index is invalid, or OGRERR_UNSUPPORTED_GEOMETRY_TYPE if the geometry type is illegal for the OGRFeatureDefn (checking not yet implemented).

Since: GDAL 1.11

◆ SetNativeData()

void OGRFeature::SetNativeData ( const char * pszNativeData )

Sets the native data for the feature.

The native data is the representation in a "natural" form that comes from the driver that created this feature, or that is aimed at an output driver. The native data may be in different format, which is indicated by GetNativeMediaType().

This function is the same as the C function OGR_F_SetNativeData().

Parameters

pszNativeData a string with the native data, or NULL if there is none.

Since: GDAL 2.1

See also: https://trac.osgeo.org/gdal/wiki/rfc60_improved_roundtripping_in_ogr

◆ SetNativeMediaType()

void OGRFeature::SetNativeMediaType ( const char * pszNativeMediaType )

Sets the native media type for the feature.

The native media type is the identifier for the format of the native data. It follows the IANA RFC 2045 (see https://en.wikipedia.org/wiki/Media_type), e.g. "application/vnd.geo+json" for JSon.

This function is the same as the C function OGR_F_SetNativeMediaType().

Parameters

pszNativeMediaType a string with the native media type, or NULL if there is none.

Since: GDAL 2.1

See also: https://trac.osgeo.org/gdal/wiki/rfc60_improved_roundtripping_in_ogr

◆ SetStyleString()

void OGRFeature::SetStyleString ( const char * pszString )

virtual

Set feature style string.

This method operate exactly as OGRFeature::SetStyleStringDirectly() except that it does not assume ownership of the passed string, but instead makes a copy of it.

This method is the same as the C function OGR_F_SetStyleString().

Parameters

pszString the style string to apply to this feature, cannot be NULL.

◆ SetStyleStringDirectly()

void OGRFeature::SetStyleStringDirectly ( char * pszString )

virtual

Set feature style string.

This method operate exactly as OGRFeature::SetStyleString() except that it assumes ownership of the passed string.

This method is the same as the C function OGR_F_SetStyleStringDirectly().

Parameters

pszString the style string to apply to this feature, cannot be NULL.

◆ SetStyleTable()

void OGRFeature::SetStyleTable ( OGRStyleTable * poStyleTable )

virtual

Set style table.

Parameters

poStyleTable new style table (will be cloned)

◆ SetStyleTableDirectly()

void OGRFeature::SetStyleTableDirectly ( OGRStyleTable * poStyleTable )

virtual

Set style table.

Parameters

poStyleTable new style table (ownership transferred to the object)

◆ StealGeometry() [1/2]

OGRGeometry * OGRFeature::StealGeometry ( )

Take away ownership of geometry.

Fetch the geometry from this feature, and clear the reference to the geometry on the feature. This is a mechanism for the application to take over ownership of the geometry from the feature without copying. Sort of an inverse to SetGeometryDirectly().

After this call the OGRFeature will have a NULL geometry.

Returns: the pointer to the geometry.

◆ StealGeometry() [2/2]

OGRGeometry * OGRFeature::StealGeometry ( int iGeomField )

Take away ownership of geometry.

Fetch the geometry from this feature, and clear the reference to the geometry on the feature. This is a mechanism for the application to take over ownership of the geometry from the feature without copying. Sort of an inverse to SetGeometryDirectly().

After this call the OGRFeature will have a NULL geometry.

Parameters

iGeomField index of the geometry field.

Returns: the pointer to the geometry.

◆ ToHandle()

static OGRFeatureH OGRFeature::ToHandle ( OGRFeature * poFeature )

inlinestatic

Convert a OGRFeature* to a OGRFeatureH.

Since: GDAL 2.3

◆ UnsetField()

void OGRFeature::UnsetField ( int iField )

Clear a field, marking it as unset.

This method is the same as the C function OGR_F_UnsetField().

Parameters

iField the field to unset.

◆ Validate()

int OGRFeature::Validate	(	int	nValidateFlags,
		int	bEmitError
	)		const

Validate that a feature meets constraints of its schema.

The scope of test is specified with the nValidateFlags parameter.

Regarding OGR_F_VAL_WIDTH, the test is done assuming the string width must be interpreted as the number of UTF-8 characters. Some drivers might interpret the width as the number of bytes instead. So this test is rather conservative (if it fails, then it will fail for all interpretations).

This method is the same as the C function OGR_F_Validate().

Parameters

nValidateFlags	OGR_F_VAL_ALL or combination of OGR_F_VAL_NULL, OGR_F_VAL_GEOM_TYPE, OGR_F_VAL_WIDTH and OGR_F_VAL_ALLOW_NULL_WHEN_DEFAULT, OGR_F_VAL_ALLOW_DIFFERENT_GEOM_DIM with '\|' operator
bEmitError	TRUE if a CPLError() must be emitted when a check fails

Returns: TRUE if all enabled validation tests pass.

Since: GDAL 2.0

The documentation for this class was generated from the following files:

ogr_feature.h
ogrfeature.cpp

Classes

Public Member Functions

Static Public Member Functions

Protected Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ OGRFeature()

Member Function Documentation

◆ begin()

◆ Clone()

◆ CopySelfTo()

◆ CreateFeature()

◆ DestroyFeature()

◆ DumpReadable()

◆ end()

◆ Equal()

◆ FillUnsetWithDefault()

◆ FromHandle()

◆ GetDefnRef() [1/2]

◆ GetDefnRef() [2/2]

◆ GetFID()

◆ GetFieldAsBinary()

◆ GetFieldAsDateTime() [1/2]

◆ GetFieldAsDateTime() [2/2]

◆ GetFieldAsDouble() [1/2]

◆ GetFieldAsDouble() [2/2]

◆ GetFieldAsDoubleList() [1/2]

◆ GetFieldAsDoubleList() [2/2]

◆ GetFieldAsInteger() [1/2]

◆ GetFieldAsInteger() [2/2]

◆ GetFieldAsInteger64() [1/2]

◆ GetFieldAsInteger64() [2/2]

◆ GetFieldAsInteger64List() [1/2]

◆ GetFieldAsInteger64List() [2/2]

◆ GetFieldAsIntegerList() [1/2]

◆ GetFieldAsIntegerList() [2/2]

◆ GetFieldAsSerializedJSon()

◆ GetFieldAsString() [1/2]

◆ GetFieldAsString() [2/2]

◆ GetFieldAsStringList() [1/2]

◆ GetFieldAsStringList() [2/2]

◆ GetFieldCount()

◆ GetFieldDefnRef() [1/2]

◆ GetFieldDefnRef() [2/2]

◆ GetFieldIndex()

◆ GetGeometryRef() [1/2]

◆ GetGeometryRef() [2/2]

◆ GetGeomFieldCount()

◆ GetGeomFieldDefnRef() [1/2]

◆ GetGeomFieldDefnRef() [2/2]

◆ GetGeomFieldIndex()

◆ GetGeomFieldRef() [1/4]

◆ GetGeomFieldRef() [2/4]

◆ GetGeomFieldRef() [3/4]

◆ GetGeomFieldRef() [4/4]

◆ GetNativeData()

◆ GetNativeMediaType()

◆ GetRawFieldRef() [1/2]

◆ GetRawFieldRef() [2/2]

◆ GetStyleString()

◆ GetStyleTable()

◆ IsFieldNull()

◆ IsFieldSet()

◆ IsFieldSetAndNotNull()

◆ operator[]() [1/4]

◆ operator[]() [2/4]

◆ operator[]() [3/4]

◆ operator[]() [4/4]

◆ SetFID()

◆ SetField() [1/21]

◆ SetField() [2/21]

◆ SetField() [3/21]

◆ SetField() [4/21]

◆ SetField() [5/21]

◆ SetField() [6/21]

◆ SetField() [7/21]

◆ SetField() [8/21]

◆ SetField() [9/21]

◆ SetField() [10/21]

◆ SetField() [11/21]