BaseHighLevelWCS

class astropy.wcs.wcsapi.BaseHighLevelWCS

Bases: object

Abstract base class for the high-level WCS interface.

This is described in APE 14: A shared Python interface for World Coordinate Systems.

Attributes Summary

low_level_wcs

Returns a reference to the underlying low-level WCS object.

Methods Summary

array_index_to_world(*index_arrays)	Convert array indices to world coordinates (represented by Astropy objects).
pixel_to_world(*pixel_arrays)	Convert pixel coordinates to world coordinates (represented by high-level objects).
world_to_array_index(*world_objects)	Convert world coordinates (represented by Astropy objects) to array indices.
world_to_pixel(*world_objects)	Convert world coordinates (represented by Astropy objects) to pixel coordinates.

Attributes Documentation

low_level_wcs

Returns a reference to the underlying low-level WCS object.

Methods Documentation

array_index_to_world(*index_arrays)

Convert array indices to world coordinates (represented by Astropy objects).

If a single high-level object is used to represent the world coordinates (i.e., if len(wcs.world_axis_object_classes) == 1), it is returned as-is (not in a tuple/list), otherwise a tuple of high-level objects is returned. See array_index_to_world_values for pixel indexing and ordering conventions.

abstract pixel_to_world(*pixel_arrays)

Convert pixel coordinates to world coordinates (represented by high-level objects).

If a single high-level object is used to represent the world coordinates (i.e., if len(wcs.world_axis_object_classes) == 1), it is returned as-is (not in a tuple/list), otherwise a tuple of high-level objects is returned. See pixel_to_world_values for pixel indexing and ordering conventions.

world_to_array_index(*world_objects)

Convert world coordinates (represented by Astropy objects) to array indices.

If pixel_n_dim is 1, this method returns a single scalar or array, otherwise a tuple of scalars or arrays is returned. See world_to_array_index_values for pixel indexing and ordering conventions. The indices should be returned as rounded integers.

abstract world_to_pixel(*world_objects)

Convert world coordinates (represented by Astropy objects) to pixel coordinates.

If pixel_n_dim is 1, this method returns a single scalar or array, otherwise a tuple of scalars or arrays is returned. See world_to_pixel_values for pixel indexing and ordering conventions.