ogrlineref

The utility can be used for:

• create linear reference file from input data
• return the "linear referenced" distance for the projection of the input coordinates (point) on the path
• return the coordinates (point) on the path according to the "linear referenced" distance
• return the portion of the path according to the "linear referenced" begin and end distances

SYNOPSIS

Usage:

ogrlineref [--help-general] [-progress] [-quiet]
           [-f format_name] [[-dsco NAME=VALUE] ...] [[-lco NAME=VALUE]...]
           [-create]
           [-l src_line_datasource_name] [-ln layer_name] [-lf field_name]
           [-p src_repers_datasource_name] [-pn layer_name] [-pm pos_field_name] [-pf field_name]
           [-r src_parts_datasource_name] [-rn layer_name]
           [-o dst_datasource_name] [-on layer_name]  [-of field_name] [-s step]
           [-get_pos] [-x long] [-y lat]
           [-get_coord] [-m position]
           [-get_subline] [-mb position] [-me position]

DESCRIPTION

The ogrlineref program can be used to create a linear reference - a file containing a segments of special length (e.g. 1 km in reference units) and get coordinates, linear referenced distances or sublines (subpaths) from this file. The utility not required the M or Z values in geometry. The results can be stored in any OGR supported format. Also some information is written to the stdout.

--help-general:

Show the usage.

-progress:

Show progress.

-quiet:

Suppress all messages except errors and results.

-f format_name:

Select an output format name. The default is to create a shapefile.

-dsco NAME=VALUE:

Dataset creation option (format specific)

-lco NAME=VALUE:

Layer creation option (format specific)

-create:

Create the linear reference file (linestring of parts).

-lsrc_line_datasource_name:

The path to input linestring datasource (e.g. the road)

-lnlayer_name:

The layer name in datasource

-lffield_name:

The field name of unique values to separate the input lines (e.g. the set of roads)

-psrc_repers_datasource_name:

The path to linear references points (e.g. the road mile-stones)

-pnlayer_name:

The layer name in datasource

-pmpos_field_name:

The field name of distances along path (e.g. mile-stones values)

-pffield_name:

The field name of unique values to map input reference points to lines

-rsrc_parts_datasource_name:

The path to linear reference file

-rnlayer_name:

The layer name in datasource

-odst_datasource_name:

The path to output linear reference file (linestring datasource)

-onlayer_name:

The layer name in datasource

-offield_name:

The field name for storing the unique values of input lines

-sstep:

The part size in linear units

-get_pos:

Return linear referenced position for input X, Y

-xlong:

Input X coordinate

-ylat:

Input Y coordinate

-get_coord:

Return point on path for input linear distance

-mposition:

The input linear distance

-get_subline:

Return the portion of the input path from and to input linear positions

-mbposition:

The input begin linear distance

-meposition:

The input end linear distance

EXAMPLE

This example would create a shapefile (parts.shp) containing a data needed for linear referencing (1 km parts):

% ogrlineref -create -l roads.shp -p references.shp -pm dist -o parts.shp -s 1000 -progress