class GeoModelAdmin default_lon The default center

class OSMGeoAdmin A subclass of GeoModelAdmin that uses a spherical mercator projection with

default_lat The default center latitude.

openlayers_url Link to the URL of the OpenLayers JavaScript. Defaults to 'http://openlayers.org/api/2.13.1/OpenLayers

default_lon The default center longitude.

extra_js Sequence of URLs to any extra JavaScript to include.

modifiable Defaults to True. When set to False, disables editing of existing geometry fields in the

default_zoom The default zoom level to use. Defaults to 18.

map_width Width of the map, in pixels. Defaults to 600.

map_template Override the template used to generate the JavaScript slippy map. Default is 'gis/admin/openlayers.html'