Thanks!

Nicolas Cadieux
https://gitlab.com/njacadieux

> Le 10 janv. 2023 à 23:37, Terry Morse via QGIS-User 
> <[email protected]> a écrit :
> 
> 
> 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]
>  
> -----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 Cadieux
> https://gitlab.com/njacadieux
>  
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