reads like Esri is cooking it's own soup there,
https://gis.stackexchange.com/questions/129764/how-are-esri-wkt-projections-different-from-ogc-wkt-projections
so the clean way probably would be, using the Esri definition if we got one or
none, if we have not presuming that SHP is an Esri format and readers would
expect those. on the other hand it seems that Gdal is more flexible wrt. the
prj file format (at least wrt. reading), so maybe what they do for _writing_ is
the way to go?
https://gis.stackexchange.com/questions/355184/prj-files-from-esri-arent-wkt
..ede
On 25.08.2022 09:08, Michaud Michael wrote:
Ede, Peppe
EPSG is good at listing all known coordinate systems in the world but
unfortunately,
standardization to describe them is a slow process and we sometime have to deal
with
different identifiers (ex. epsg/esri), names (wkt/esri convention), formats
(wkt, wkt2).
This post gives some good hints on this problem :
https://gis.stackexchange.com/questions/355184/prj-files-from-esri-arent-wkt
<https://gis.stackexchange.com/questions/355184/prj-files-from-esri-arent-wkt>
When I added pe_list_projcs_geogcs, it was because we cannot retrieve the exact
esri denomination from the srid2prj.txt which is based on epsg data.
I don't know why some srid are missing from pe_list_projcs_geogcs but it is an
esri database not epsg.
Now, if the srid is not find in pe_list_projcs_geogcs, I get it from srid2prj
as sugggested by Peppe but
this later does not follow esri naming convention. An "esri" friendly name can
be retrieved
from epsg.io web site, but this is online. I don't know if they use a esri
database or if they use
some rules to make names esri friendly as discussed in the post.
Michaël
envoyé : 21 août 2022 à 13:20
de : edgar.sol...@web.de
à : jump-pilot-devel@lists.sourceforge.net
objet : Re: [JPP-Devel] OpenJUMP throws a null point exception if coord_ref_sys
is found
On 21.08.2022 10:56, Michaud Michael wrote:
Hi Peppe,
You're right, I found 171 srid in srid2prj which are not in
pe_list_projcs_geogcs.zip.
Can you remember where the srid2prj file comes from ? And can you telle me
which projection you use which are not in pe_list_projcs_geogcs.zip (just
curious).
Using several reference file is far from ideal, but until we find a better
option, your proposition seems reasonable to me.
hmm, a quick text search does not find all of these in
https://github.com/Esri/projection-engine-db-doc/
and what i can find is spread over several files. any idea why that is?
why is there not a _complete_ epsgid/name mapping file somewhere? or is there
and we are just not using it?
registering and downloading wkt files-zip from https://epsg.org/download-dataset.html
seems to inlude "all" of the missing epsg-ids. should we reformat and use those?
sunny regards ..ede
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