Andrea Aime a écrit :
> I'm wondering if the area of validity of each projection
> could be used to solve your problem. The area of validity is available
> only for projections coming from a real EPSG database (not the wkt
> provider then), and moreover it's just a bounding box, so it may not
> serve your purpose... A better solution would be to find a shapefile
> with a polygon for each state plane zone, maybe USGS has one.
It is worth to point out that EPSG is considering to add real polygons for
"area
of validity" in a future version of the EPSG database. I don't remember exactly
where I have read that, in some note accompagning the EPSG database
documentation I believe.
Martin
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