[mapserver-users] Corrupted PNG issue

[Even Rouault]

>
> GDAL 2.4.4 doesn't create zips so it must be MapServer doing the 
> zipping in this version at least?

Direct support for zipped shape is a recent GDAL 3 addition, which 
MapServer doesn't use. MapServer uses instead a lower level GDAL's CPL 
ZIP API: 
https://github.com/MapServer/MapServer/blob/main/mapogroutput.cpp#L1304


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