polygon_search

Catalog.polygon_search(vertices: list[tuple[float, float]], fine: bool = True) → Self

Perform a polygonal search to filter the catalog.

IMPORTANT: Requires additional lsst-sphgeom package

Filters to points within the polygonal region specified in ra and dec, in degrees. Filters partitions in the catalog to those that have some overlap with the region.

Parameters:

verticeslist[tuple[float, float]]

The list of vertices of the polygon to filter pixels with, as a list of (ra,dec) coordinates, in degrees.

finebool, default True

True if points are to be filtered, False if not. Defaults to True.

Returns:

Self

A new catalog containing the points filtered to those within the polygonal region, and the partitions that have some overlap with it.