gis.db.models.GeoQuerySet.transform()

GeoQuerySet.transform(srid=4326, **kwargs)

Deprecated since version 1.9: Use the Transform function instead.

Availability: PostGIS, Oracle, SpatiaLite

The transform method transforms the geometry field of a model to the spatial reference system specified by the srid parameter. If no srid is given, then 4326 (WGS84) is used by default.

Note

Unlike other GeoQuerySet methods, transform stores its output “in-place”. In other words, no new attribute for the transformed geometry is placed on the models.

Note

What spatial reference system an integer SRID corresponds to may depend on the spatial database used. In other words, the SRID numbers used for Oracle are not necessarily the same as those used by PostGIS.

Example:

>>> qs = Zipcode.objects.all().transform() # Transforms to WGS84
>>> qs = Zipcode.objects.all().transform(32140) # Transforming to "NAD83 / Texas South Central"
>>> print(qs[0].poly.srid)
32140
>>> print(qs[0].poly)
POLYGON ((234055.1698884720099159 4937796.9232223574072123 ...

Links:

https://docs.djangoproject.com/en/1.10/ref/contrib/gis/geoquerysets/#django.contrib.gis.db.models.GeoQuerySet.transform

doc_Django

2016-10-09 18:37:31

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