On Mon, 17 Mar 2025 at 11:40, Lesparre, Jochem via PROJ < proj@lists.osgeo.org> wrote:
> > A further question might be how the cutlines relate to the 'area of use' > in the EPSG database, but I'm afraid the answer is that the area of use is > a geodetic bounding box. It does seem that a projection database ideally > would have this information. > > The 'area of use' is a polygon in the EPSG database. It is PROJ that > converts this into a bounding box. > Not exactly. In the database it has a bounding box, like in this example (from PostgreSQL_Data_Script.sql) INSERT INTO epsg_extent (extent_code, extent_name, extent_description, bbox_south_bound_lat, bbox_west_bound_lon, bbox_north_bound_lat, bbox_east_bound_lon, iso_a2_code, iso_a3_code, iso_n_code, vertical_extent_min, vertical_extent_max, vertical_extent_crs_code, temporal_extent_begin, temporal_extent_end, remarks, information_source, data_source, revision_date, change_id, deprecated) VALUES (1275, 'Netherlands - onshore', 'Netherlands - onshore, including Waddenzee, Dutch Wadden Islands and 12-mile offshore coastal zone.', 50.75, 3.2, 53.7, 7.22, '', '', Null, Null, Null, Null, '', '', '', 'IOGP', 'EPSG', '2024-06-26', '2009.046 2011.082 2012.013 2014.024 2023.042', 0); In addition to that there is an external (big) file with the definition of those polygons. Including those polygons in the database would make it unnecessarily big. Cheers Javier. > > Jochem > > > Disclaimer: > De inhoud van deze e-mail is vertrouwelijk en uitsluitend bestemd voor de > geadresseerde(n). > Gebruik, openbaarmaking, vermenigvuldiging, verspreiding en/of > verstrekking van deze informatie aan derden is niet toegestaan. > Op al onze producten en diensten zijn onze algemene leveringsvoorwaarden > van toepassing > [https://www.kadaster.nl/algemene-leveringsvoorwaarden]. > > Disclaimer: > This email and any files transmitted with it are confidential and intended > solely for the use of the individual or entity to whom they are addressed. > If you are not the intended recipient, you are notified that disclosing, > copying, distributing or taking any action in reliance on the contents of > this information is strictly prohibited. > Our general terms and conditions of delivery apply to all our products and > services > [https://www.kadaster.com/general-terms-and-conditions]. > _______________________________________________ > PROJ mailing list > PROJ@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/proj >
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