GeoDjango menyediakan beberapa bidang formulir khusus dan widget untuk secara penglihatan menampilkan dan merubah data geolokal pada peta. Secara awalan, mereka menggunakan peta ditenagai-OpenLayers, dengan lapisan WMS dasar disediakan oleh NASA.
Sebagai tambahan pada form field arguments 1 biasa, bidang formulir GeoDjango mengambil argumen pilihan berikut.
srid¶Ini adalah kode SRID dimana nilai bidang harus dirubah. Sebagai contoh, jika widget peta SRID berbeda dari SRID lebih umumnya digunakan oleh aplikasi anda atau basisdata, bidang akan otomatis merubah nilai masukan menjadi SRID itu.
geom_type¶You generally shouldn't have to set or change that attribute which should be set up depending on the field class. It matches the OpenGIS standard geometry name.
GeometryField¶PointField¶LineStringField¶PolygonField¶MultiPointField¶MultiLineStringField¶MultiPolygonField¶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 GeoDjango adalah berdasarkan-cetakan, jadi atribut-atribut mereka kebanyakan berbeda dari atribut widget Django.
A string that specifies the identifier for the default base map layer to be
used by the corresponding JavaScript map widget. It is passed as part of
the widget options when rendering, allowing the MapWidget to determine
which map tile provider or base layer to initialize (default is None).
Jenis geometri OpenGis, umumnya disetel oleh bidang formulir.
Kode SRID digunakan oleh peta (awalan adalah 4326).
Nilai boolean menentukan jika sebuah masukan textarea menunjukkan perwakilan terserial dari geometri saat ini adalah terlihat, utamanya untuk tujuan mencari kesalahan (awalan adalah False).
Menunjukkan jika edisi dukungan widget dari data 3D (awalan adalah False).
Cetakan digunakan untuk membangun widget peta.
Anda dapat melewatkan atribut widget dalam cara sama yang untuk widget Django apapun. Sebagai contoh:
from django.contrib.gis import forms
class MyGeoForm(forms.Form):
point = forms.PointField(widget=forms.OSMWidget(attrs={"display_raw": True}))
BaseGeometryWidget
This is an abstract base widget containing the logic needed by subclasses.
You cannot directly use this widget for a geometry field.
Note that the rendering of GeoDjango widgets is based on a base layer name,
identified by the base_layer class attribute.
OpenLayersWidget
This is the default widget used by all GeoDjango form fields. Attributes are:
nasaWorldview
gis/openlayers.html.
3857
OpenLayersWidget and OSMWidget include the ol.js and
ol.css files hosted on the cdn.jsdelivr.net content-delivery
network. These files can be overridden by subclassing the widget and
setting the js and css properties of the inner Media class (see
Aset sebagai pengertian tetap).
External assets with CSP
When ContentSecurityPolicyMiddleware is
enabled, the default OpenLayers CDN assets (ol.js and ol.css)
will be blocked unless explicitly allowed. This can be addressed in one
of two ways: serve assets locally by subclassing the widget and
provide local copies of the JavaScript and CSS files, or
allow the CDN in the CSP policy.
For example, to allow the default NASA Worldview base layer (replace
x.y.z with the actual version):
from django.utils.csp import CSP
SECURE_CSP = {
"default-src": [CSP.SELF],
"script-src": [CSP.SELF, "https://cdn.jsdelivr.net/npm/ol@x.y.z/dist/ol.js"],
"style-src": [CSP.SELF, "https://cdn.jsdelivr.net/npm/ol@x.y.z/ol.css"],
"img-src": [CSP.SELF, "https://*.earthdata.nasa.gov"],
}
OSMWidget
This widget specialized OpenLayersWidget and uses an OpenStreetMap
base layer to display geographic objects on. Attributes are:
osm
Nilai awalan tengah garis lintang dan bujur 47 dan 5, masing-masing, yang bertempat di Perancis Timur.
Pembesaran peta awalan adalah 12.
The OpenLayersWidget note about using external assets also applies
here. See also this FAQ answer about https access to map tiles.
OpenStreetMap tiles with CSP
This widget uses OpenStreetMap tiles instead of NASA Worldview. If
Content Security Policy enabled, both the OpenLayers CDN resources (as
required by OpenLayersWidget) and the OpenStreetMap tile
servers must be allowed:
from django.utils.csp import CSP
SECURE_CSP = {
# other directives
"img-src": [CSP.SELF, "https://tile.openstreetmap.org"],
}
The OSMWidget no longer uses a custom template. Consequently, the
gis/openlayers-osm.html template was removed.
To customize the base layer displayed in OpenLayers-based geometry widgets, define a new layer builder in a custom JavaScript file. For example:
path-to-file.js¶ MapWidget.layerBuilder.custom_layer_name = function () {
// Return an OpenLayers layer instance.
return new ol.layer.Tile({source: new ol.source.<ChosenSource>()});
};
Then, subclass a standard geometry widget and set the base_layer:
from django.contrib.gis.forms.widgets import OpenLayersWidget
class YourCustomWidget(OpenLayersWidget):
base_layer = "custom_layer_name"
class Media:
js = ["path-to-file.js"]
Des 03, 2025