Hello. I have to downgrade my application from gdal 3.1.2 to 2.1.2 built on libGeos 3.5.1. For some reason. So I have to work around the absence of some methods introduced only in later releases. The first thing i met was MakeValid and IsValid. In my application it is used for Polygons. There is two aspects: 1. What does exactly "valid geometry" mean? What does IsValid check? As it is written in docs: Returns true if geometry has no points". I'm not sure, that I understand it correctly. 2. Is there a proper way to replace MakeValid with something in order to keep my app functional?
Thanks
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