BaseHighLevelWCS¶
- class astropy.wcs.wcsapi.BaseHighLevelWCS[source]¶
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
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)[source]¶
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. Seearray_index_to_world_values
for pixel indexing and ordering conventions.
- abstract pixel_to_world(*pixel_arrays)[source]¶
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. Seepixel_to_world_values
for pixel indexing and ordering conventions.
- world_to_array_index(*world_objects)[source]¶
Convert world coordinates (represented by Astropy objects) to array indices.
If
pixel_n_dim
is1
, this method returns a single scalar or array, otherwise a tuple of scalars or arrays is returned. Seeworld_to_array_index_values
for pixel indexing and ordering conventions. The indices should be returned as rounded integers.
- abstract world_to_pixel(*world_objects)[source]¶
Convert world coordinates (represented by Astropy objects) to pixel coordinates.
If
pixel_n_dim
is1
, this method returns a single scalar or array, otherwise a tuple of scalars or arrays is returned. Seeworld_to_pixel_values
for pixel indexing and ordering conventions.