Thanks Huck,

Direct extraction from a zip file is potentially useful, but in my experience not a common use case. (Although perhaps that's because there are no tools to do so...).

Maybe there is a module that supports reading from archives as a file handle? Archive::Zip has readFromFileHandle() but that would need special handling in Geo::Shapefile each time data are accessed from file.

Also, one thing to watch for in any plotting code is holes in the polygons. I don't think the Tiger data have holes, but in the shapefile spec they are implied by vertex order instead of being explicitly flagged. https://www.esri.com/library/whitepapers/pdfs/shapefile.pdf

Shawn.

In reply to Re^3: Geo::ShapeFile memory problem by swl
in thread Geo::ShapeFile memory problem by rhzhang

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