Class BaseSpatialField
The Base GIS Field.
Declaration
class BaseSpatialField(Field)
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It's used as a base class for GeometryField and RasterField. Defines
properties that are common to all GIS fields such as the characteristics
of the spatial reference system of the field.
Methods
▶ def __init__(self, verbose_name=None, srid=4326, spatial_index=True, **kwargs) The initialization function for base spatial fields. Takes the following as keyword arguments:
srid:
The spatial reference system identifier, an OGC standard.
Defaults to 4326 (WGS84).
spatial_index:
Indicates whether to create a spatial index. Defaults to True.
Set this instead of 'db_index' for geographic fields since index
creation is different for geometry columns.
Overrides
This method is overriden in:
Overrides
This method is overriden in:
Overrides
This method is overriden in:
▷ def geodetic(self, connection) Return true if this field's SRID corresponds with a coordinate system that uses non-projected units (e.g., latitude/longitude).
▷ def get_placeholder(self, value, compiler, connection) Return the placeholder for the spatial column for the given value.
▷ def get_raster_prep_value(self, value, is_candidate) Return a GDALRaster if conversion is successful, otherwise return None.
▶ def get_srid(self, obj) Return the default SRID for the given geometry or raster, taking into
account the SRID set for the field. For example, if the input geometry
or raster doesn't have an SRID, then the SRID of the field will be
returned.
▷ def units(self, connection)
Subclasses
Reexports