On Tue, 9 Feb 2021 at 08:02, Илья Нецветаев wrote:
> 1. What does exactly "valid geometry" mean?
You will find it in the OGC SFS specification
> What does IsValid check?
Read https://postgis.net/docs/ST_IsValid.html and
https://postgis.net/docs/postgis_usage.html#OGC_Validity
Read the GEOS lib
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 tw
