I am looking for a way to select points from a feature layer that fall within this feature layer: Layer: Atl_slr_merged_2ft (ID: 6)
Using the method described here would work, union and then use the geometry of the union feature to select what falls within it. But if your feature layer has thousands of polygons, the union would take forever.
So my question is, am I approaching this issue wrong? Is my only option to union the layer before publishing it on a server ( which I sadly can't do, because I don't have the feature layer and rely on NOAA hosting it).
Any input would be greatly appreciated!