Add a from_geo_json() to Transformer

[gjclark]

CIRRUS-NISAR requires generating Spatial Extent from GeoJSON and not WKT as before.

[gjclark]

def to_polygons(obj: Geometry) -> TransformationResult:
    """Convert a geometry to a sequence of polygons.
    :returns: a generator yielding the polygon sequence.
    :raises: Exception
    """
    if isinstance(obj, MultiPolygon):
        for poly in obj.geoms:
            yield poly
        return
    if isinstance(obj, Polygon):
        yield obj
        return
    raise Exception(f"WKT: '{obj}' is not a Polygon or MultiPolygon")

The Exception can be triggered by the GeoJSON as well. I feel like it is better to just remove WKT: so not to mislead when it's triggered by GeoJSON. obj itself is a shapely geometry anyways not a WKT.

[gjclark]

Cannot for the life of me figure out the flake8 issue. Hashtag doesn't happen on my machine. But really, I don't know what's going on.

[mattp0]

Looks good minus the style stuff. We should fix that before its merged

[reweeden]

Looks good except the indentation issue. I would support removing the WKT from the error message.

[reweeden]

These lines are indented an extra level.

[reweeden]

Oh, you also should've bumped the version number in the pyproject.toml. Now it is out of sync with the version on the releases page: https://github.com/asfadmin/geo_extensions/blob/main/pyproject.toml