I have two csv files, each with lat/long coordinates. I converted them into sf objects, giving each GCS (geographic coordinate system) crs. When I use the st_nearest_feature function, I get this warning:
although coordinates are longitude/latitude, st_nearest_feature assumes that they are planar
I'm just getting the index of the closest points and don't need the exact distance.
Are there any problems in not converting the coordinate systems ahead of time that I should be aware of?