Playing around with the 'Edit gridset' page under 'Tile Caching' in the
GeoServer admin area I see that GWC / GeoServer is able to retrieve the
maximum extent of the CRS set in this page.

I'm interested in learning how this query is performed, and if I can use the
same functionality in my own application via an HTTP call or something a
little more complex.

Also, I see that these computed bounds for my CRS (EPSG:2269 Oregon State
Plane) are different to those available on both EPSG-registry (after
conversion) and spatialreference.org (no conversion required).

Could anyone please tell me
a) how the CRS max extent is calculated, and
b) why three different sources would provide a different max extent for the
EPSG:2269

Thanks!



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