old_contents: from django.contrib.gis import admin
  from django.contrib.gis.maps.google import GoogleMap
  from django.conf import settings
  
  from geotags.models import Point, Line, Polygon
  from geotags.models import Line,MultiLine
  from geotags.models import Polygon
  from geotags.models import GeometryCollection
  
  GMAP = GoogleMap(key=settings.GOOGLE_MAPS_API_KEY)
  
  class PointAdmin(admin.OSMGeoAdmin):
      extra_js = [GMAP.api_url + GMAP.key]
      map_template = 'gis/admin/google.html'
      list_filter = ('content_type','point' )
      list_display = ('object', 'point', 'content_type', 'object_id')
  
  class LineAdmin(admin.OSMGeoAdmin):
      extra_js = [GMAP.api_url + GMAP.key]
      map_template = 'gis/admin/google.html'
      list_filter = ('content_type','line' )
      list_display = ('object', 'line', 'content_type', 'object_id')
  
  class PolygonAdmin(admin.OSMGeoAdmin):
      extra_js = [GMAP.api_url + GMAP.key]
      map_template = 'gis/admin/google.html'
      list_filter = ('content_type','polygon' )
      list_display = ('object', 'polygon', 'content_type', 'object_id')
  
  admin.site.register(Point, PointAdmin)
  admin.site.register(Line, LineAdmin)
  admin.site.register(Polygon, PolygonAdmin)
  admin.site.register(MultiLine, admin.GeoModelAdmin)
  admin.site.register(GeometryCollection, admin.GeoModelAdmin)
  
new_contents: from django.contrib.gis import admin
  from django.contrib.gis.maps.google import GoogleMap
  from django.conf import settings
  
  from geotags.models import Point, Line, Polygon
  from geotags.models import Line,MultiLine
  from geotags.models import Polygon
  from geotags.models import GeometryCollection
  
  GMAP = GoogleMap(key=settings.GOOGLE_MAPS_API_KEY)
  
  class LinkToObjectMixin(object):
      """
      This Mixin add a column with a link to the object associated with the geom
      (point, line, polygon)
      """
      def link_to_object(self,obj):
          """
          Add a link to the related object
          """
          item = obj.object
          return u'<a href="../../%s/%s/%s/" title="Access in admin">%s</a>' % (\
                                     item.__class__._meta.app_label,
                                     item.__class__._meta.module_name,
                                     item.id,
                                     item)
      link_to_object.short_description = u'Object'
      link_to_object.allow_tags = True
  
  
  class PointAdmin(admin.OSMGeoAdmin,LinkToObjectMixin):
      extra_js = [GMAP.api_url + GMAP.key]
      map_template = 'gis/admin/google.html'
      list_filter = ('content_type','point' )
      list_display = ('point', 'content_type', 'object_id','link_to_object')
  
  
  class LineAdmin(admin.OSMGeoAdmin,LinkToObjectMixin):
      extra_js = [GMAP.api_url + GMAP.key]
      map_template = 'gis/admin/google.html'
      list_filter = ('content_type','line' )
      list_display = ('line', 'content_type', 'object_id','link_to_object')
  
  class PolygonAdmin(admin.OSMGeoAdmin,LinkToObjectMixin):
      extra_js = [GMAP.api_url + GMAP.key]
      map_template = 'gis/admin/google.html'
      list_filter = ('content_type','polygon' )
      list_display = ('polygon', 'content_type', 'object_id','link_to_object')
  
  admin.site.register(Point, PointAdmin)
  admin.site.register(Line, LineAdmin)
  admin.site.register(Polygon, PolygonAdmin)
  admin.site.register(MultiLine, admin.GeoModelAdmin)
  admin.site.register(GeometryCollection, admin.GeoModelAdmin)
  
subject: Improve the admin interface by adding a direct link in django site admin to the object associated to a point, line, polygon