OpenLayers default position

[Mattias Dalkvist]

The openlayers.js templet don't take the display projection setting from the GeoModelAdmin classes in to consideration when applying the default position.

Fore example then the display projection is sett to 4326 (wgs83 standard lon/lat) and the map projection is sett to 900913 (the "google projection").
Then it is reasonable to expect the default position to be in the display projection and not the map projection.

The supplied patch checks to see if the display_projection is sett, if it is then adds a transformation call (from display projection to map projection) when the default position is used, in the openlayers.js

[Aymeric Augustin]

Change UI/UX from NULL to False.

[Aymeric Augustin]

Change Easy pickings from NULL to False.

[Tim Graham]

Claude, could you confirm there is value in keeping this ticket open given it hasn't seen activity in 6 years?

[Claude Paroz]

The reporter was right and the issue might still be accurate (we have some similar center conversion code in OLMapWidget.js).

However, I'm not so much interested in fixing this, as I'd like to see openlayer.js disappear. But that would mean deprecating GeoModelAdmin as a whole and I'm not sure we can do this now without loosing some functionalities.

[Richard Laager]

Since I marked #11094 as a duplicate of this one, I wanted to copy over this work-around that might be useful to people (as it was for me):

jbronn wrote in #11094 comment 4:

The default_lon and default_lat are not working for you because OSMGeoAdmin uses a different projection system than GeoModelAdmin. Specifically, OSMGeoAdmin uses the so-called "Google" projection (SRID=900913) and GeoModelAdmin uses WGS84 (SRID=4326). As such, just transform your default_lon and default_lat values to 900913:

>>> from django.contrib.gis.geos import Point
>>> pnt = Point(lon, lat, srid=4326)
>>> pnt.transform(900913)
>>> default_lon, default_lat = pnt.coords

These days, I would use 3857 instead of 900913 in the .transform().

[Mariusz Felisiak]

GeoModelAdmin and OSMGeoAdmin are deprecated (see 4555aa0a489cb9dcf764edf12339097cdfa5ff84).