    in a geographic coordinate system such as WGS84.
  
  __ https://en.wikipedia.org/wiki/Geodesy
  __ https://en.wikipedia.org/wiki/Great_circle
  __ https://www.spatialreference.org/ref/epsg/2796/
  __ https://spatialreference.org/
  __ https://web.archive.org/web/20080302095452/http://welcome.warnercnr.colostate.edu/class_info/nr502/lg3/datums_coordinates/spcs.html
  
  ``spatial_index``
  -----------------
 
</s> remove __ https://www.opengeospatial.org/standards/sfs
 </s> add __ https://www.ogc.org/standards/sfs </s> remove __ https://github.com/maxmind/libmaxminddb
 </s> add __ https://github.com/maxmind/libmaxminddb/ </s> remove __ https://groups.google.com/d/forum/geodjango
 </s> add __ https://groups.google.com/g/geodjango </s> remove __ http://www.finkproject.org/
__ http://pdb.finkproject.org/pdb/browse.php?summary=django-gis
 </s> add __ https://www.finkproject.org/
__ https://pdb.finkproject.org/pdb/browse.php?summary=django-gis </s> remove     __ https://www.djangosnippets.org/
    __ https://www.djangosnippets.org/snippets/603/
 </s> add     __ https://djangosnippets.org/
    __ https://djangosnippets.org/snippets/603/
__ https://spatialreference.org/ref/epsg/2796/
    in a geographic coordinate system such as WGS84.
  
  __ https://en.wikipedia.org/wiki/Geodesy
  __ https://en.wikipedia.org/wiki/Great_circle
__ https://spatialreference.org/ref/epsg/2796/
  __ https://spatialreference.org/
  __ https://web.archive.org/web/20080302095452/http://welcome.warnercnr.colostate.edu/class_info/nr502/lg3/datums_coordinates/spcs.html
  
  ``spatial_index``
  -----------------
keep keep keep keep replace keep keep keep keep keep
 Refs #32720 -- Updated various links in docs to avoid redirects and use HTTPS. 
docs/ref/contrib/gis/model-api.txt