How to count the number of points inside or outside a polygon? looks easy but will be difficult if the number of points is large or the polygon shape is complex.
UTM Geo Map has an algorithm to calculate the number of points inside or outside a polygon, this is a free tool and you can use it as you like to help your work. To provide a clearer picture, you can see it in the following video:
Module to use: Marker Map
Module Icon:
Steps: Open Marker Map module > Click on existing polygon > Click Count Point nside / Outside Polygon
Read Next: Delete Points Inside or Outside Polygon