Principles of Geographical Information Systems, by Burrough and McDonnell (Oxford: Oxford Univ. Pr., 1998; ISBN 0198233655) has a brief treatment of point-in-polygon on page 64 (box 3.4), or see Principles of Geographical Information Systems, 3rd ed., by Burrow, McDonnell, and Lloyd (Oxford: Oxford Univ. Pr. 2015; ISBN 0198742845), where it is Box 7.3 on page 140. It may not be as detailed as you want, but it's a beginning. Wikipedia has an article with a little more detail at https://en.wikipedia.org/wiki/Point_in_polygon that includes references.
There are scripts at https://www.geeksforgeeks.org/how-to-check-if-a-given-point-lies-inside-a-polygon/ in both c++ and python. Terry Morse [email protected] (mailto:[email protected]) -----Original Message----- From: Nicolas Cadieux <[email protected]> Sent: Jan 10, 2023 7:23 PM To: Qgis List <[email protected]> Subject: [Qgis-user] The theory behind topology Hi, I am curious to learn the math behind topology. For example, I would like to know how something like “selecting points in a polygon “ is actually done from a programming point of view. If you have a good resource (books, video, articles…) please send it my way. Thanks Nicolas Cadieuxhttps://gitlab.com/njacadieux
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