Synopsis
Return the axis transform from an IMAGECrate.
Syntax
get_axis_transform(crate, category)
Description
| Argument | Description |
|---|---|
| crate | The image crate. |
| category | One of: "WORLD", "PHYSICAL", or "LOGICAL" (case insensitive). |
The get_axis_transform command extracts the 'default' axis transform of the given category from the input crate.
Example
>>> cr = read_file("image.fits")
>>> trans = get_axis_transform(cr, "WORLD")
>>> a = [[4096.5, 4096.5], [4823.2, 3843.87]]
>>> b = trans.apply(a)We extract the WCS transfrom from the image - this translates SKY coordinates to equatorial - and use it to convert two positions: (4096.5,4096.5) and (4823.2,3843.87). The result for this dataset looks like:
>>> print(b) [[ 116.06831306 37.90866459] [ 115.94249553 37.87407155]]
Bugs
See the bug pages on the CIAO website for an up-to-date listing of known bugs.
Refer to the CIAO bug pages for an up-to-date listing of known issues.
See Also
- crates
- copy_piximgvals, get_col, get_col_names, get_colvals, get_crate_item_type, get_crate_type, get_key, get_key_names, get_keyval, get_number_cols, get_number_rows, get_piximg, get_piximg_shape, get_piximgvals, get_transform, get_transform_matrix
- transform
- apply_transform, copy_transform, get_transform_type