With *proj_crs_get_coordinate_system* and *proj_cs_get_axis_info* you can get the needed info. See the difference between CRS (coordinate reference system) and CS (coordinate system).
On Tue, 30 Jul 2024 at 16:10, Mladen Mijatovic <[email protected]> wrote: > Hi Javier, > > I am using a .NET wrapper around the Proj, called SharpProj. I am creating > crs from a database, using *proj_create_from_database* with authority > EPSG and coe 2193 as params. Next thing I try is to convert some positions > using* proj_create_crs_to_crs_from_pj *with EPSG:2193 as source crs and > EPSG:4326 as target crs. Next call is to *proj_trans* without forwarding > and with and with coordinates [-41.302232653193769, 174.77951032151356] > as lat, lon. The result is an array of 2, converted[0] = 799875.43712394813 > and converted[1] = 400261.41900983331 From this array I need to know what > to pick as Northing and what as Easting. > > уто, 30. јул 2024. у 14:37 Javier Jimenez Shaw <[email protected]> је > написао/ла: > >> Hi Mladen, >> >> In which context do you want to do that? python? C++? CLI? What are you >> doing later with that info (like calling cs2cs or anything else)? >> If you just want to know for a few cases, >> https://spatialreference.org/ref/epsg/2193/ is an easy reference. There >> is axis information. >> >> Cheers >> >> On Tue, 30 Jul 2024 at 14:11, Mladen Mijatovic via PROJ < >> [email protected]> wrote: >> >>> Hi all, >>> >>> Is there a way to identify if crs has an inverted axis? In most of the >>> cases axes are Lat,Lon or E,N but I stumbled on one with axis N,E - >>> EPSG:2193. In this case I need to invert coordinates before the >>> transformation and I am not sure how to identify this situation in general. >>> _______________________________________________ >>> PROJ mailing list >>> [email protected] >>> https://lists.osgeo.org/mailman/listinfo/proj >>> >>
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