How to find the extent of (many) EPSG CRSes?

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I want to map the geographic extents / bounding boxes of a lot of EPSG CRSes. At least, those with a rectangular geographic extent.

For example, take epsg:2004, visiting that page shows the extent (both projected and geographic).



There are several sites with this info, which make it trivial to find the extent for a single CRS at a time

Is there an easy way to extract this information off-line using QGIS, proj4 or other FOSS tools? Preferably without needing to parse the WKT/proj4 strings (which are easy enough to find, they're sitting in any postgis-enabled database)

Online queries (to an API or web service) would be good too.

Other things I've looked at:-

  • I don't see anything in the QgsCoordinateReferenceSystem class for this, so I assume that qgis doesn't do any bounds checking and throws all the points at proj4, which will complain (with a "forward projection failure") if any points fall outside the valid bounds.
  • Also, pyproj (the python wrapper for proj4) doesn't seem to be able to extract this info, it's really just for transforming between CRSes.

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