in reply to Perl Mapping (GIS)
Thanks everyone for the suggestions!
Right now I am testing sort of a hybrid solution, building static layers with QGIS on PC and uploading to server (these rarely need to change). And then doing a mix of GDAL and ImageMagick for the real time merges.
This mostly works for what I need. I am going to look through some of the other suggestions as well. Trying to find a good mix to keep server loads down.
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