Detect position intersections with a polygon. — atl_within

Detects which positions intersect a sfc_*POLYGON. Tested only for single polygon objects.

atl_within_polygon(data, x = "x", y = "y", polygon)

Arguments

data	A dataframe or similar containg at least X and Y coordinates.
x	The name of the X coordinate, assumed by default to be "x".
y	The Y coordinate as above, default "y".
polygon	An `sfc_*POLYGON` object which must have a defined CRS. The polygon CRS is assumed to be appropriate for the positions as well, and is assigned to the coordinates when determining the intersection.

Row numbers of positions which are inside the polygon.