GeoDjango Forms API

In addition to the regular , GeoDjango form fields take the following optional arguments.

Field.``srid

This is the SRID code that the field value should be transformed to. For example, if the map widget SRID is different from the SRID more generally used by your application or database, the field will automatically convert input values into that SRID.

geom_type

Field.``geom_type

You generally shouldn’t have to set or change that attribute which should be setup depending on the field class. It matches the OpenGIS standard geometry name.

GeometryField

class GeometryField

PointField

class PointField

class LineStringField

PolygonField

class PolygonField

class MultiPointField

MultiLineStringField

class MultiLineStringField

class MultiPolygonField

GeometryCollectionField

class GeometryCollectionField

GeoDjango form widgets allow you to display and edit geographic data on a visual map. Note that none of the currently available widgets supports 3D geometries, hence geometry fields will fallback using a Textarea widget for such data.

Widget attributes

GeoDjango widgets are template-based, so their attributes are mostly different from other Django widget attributes.

The OpenGIS geometry type, generally set by the form field.

BaseGeometryWidget.``map_height

BaseGeometryWidget.``map_width

Height and width of the widget map (default is 400x600).

BaseGeometryWidget.``map_srid

SRID code used by the map (default is 4326).

BaseGeometryWidget.``display_raw

Boolean value specifying if a textarea input showing the serialized representation of the current geometry is visible, mainly for debugging purposes (default is False).

BaseGeometryWidget.``supports_3d

Indicates if the widget supports edition of 3D data (default is False).

BaseGeometryWidget.``template_name

The template used to render the map widget.

You can pass widget attributes in the same manner that for any other Django widget. For example:

Widget classes

BaseGeometryWidget

class BaseGeometryWidget

OpenLayersWidget

class

This is the default widget used by all GeoDjango form fields. template_name is gis/openlayers.html.

OpenLayersWidget and OSMWidget use the openlayers.js file hosted on the cdnjs.cloudflare.com content-delivery network. You can subclass these widgets in order to specify your own version of the OpenLayers.js file in the js property of the inner Media class (see ).

OSMWidget

class OSMWidget

This widget uses an OpenStreetMap base layer to display geographic objects on. Attributes are:

• template_name

  gis/openlayers-osm.html

• default_lat

• default_zoom

  The default map zoom is 12.

The OpenLayersWidget note about JavaScript file hosting above also applies here. See also this about https access to map tiles.