The default center longitude.
The default center latitude.
The default zoom level to use. Defaults to 18.
Width of the map, in pixels. Defaults to 600.
Height of the map, in pixels. Defaults to 400.
Defaults to True. When set to False, disables editing of existing geometry fields in the admin.
This is different from adding the geometry field to readonly_fields, which will only display the WKT of the geometry. Setting modifiable=False, actually displays the geometry in a map, but disables the ability to edit its vertices.