[Proj] Relationship between proj4 and spatialreference.org
j.l.h.hartmann at uva.nl
Wed Jan 2 09:41:00 EST 2013
This is a problem, as OpenLayers looks by default to
spatialreference.org when a projection has not been explicitly defined
"displayProjection" item in the map controls. You get the wrong
coordinates without being told that someting isn't right.
Is it very difficult to synchronize spatialreference.org with (e.g.) the
proj epsg file? If I remember correctly, Frank has an automated updated
procedure from the epsg database. Could that procedure be extended to
spatialreference.org? I would be willing to put some effort in it, as I
am working on a geographical indexing system of our map library, and
there are many historical maps in it with projections that are not in
the epsg database. Spatialreference.org would be an ideal system for
these maps, but it would only be workable if all information were up to
On 12/31/2012 04:19 PM, Howard Butler wrote:
> On Dec 31, 2012, at 7:13 AM, Jan Hartmann <j.l.h.hartmann at uva.nl> wrote:
>> Can anyone tell me how the references at spatialreference.org are related to the proj-strings of the official proj library? Nowadays proj includes lots of WGS-84 shifts, and at least one of them (28992, Dutch RD) is not propagated to spatialreference.org.
> The relationship to spatialreference.org is one of being simply out-of-date. sr.org has not been updated in quite a while, and it needs a champion to come along and bring things forward. sr.org gets its definitions from proj.4/GDAL as well as GeoTools. These have not been refreshed in at least a couple of years -- time for more than one EPSG database drop and the inclusion of datum shifting description in proj.4.
> Hope this helps,
> Proj mailing list
> Proj at lists.maptools.org
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