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Base/mixin classes for the spatial backend database operations and the
`SpatialRefSys` model the backend.
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This module holds the base `BaseSpatialBackend` object, which is
instantiated by each spatial database backend with the features
it has.
c C s t d � � d S( Ns: Aggregate extent not implemented for this spatial backend.( t NotImplementedError( t selft box( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyt convert_extentU s c C s t d � � d S( Ns= Aggregate 3D extent not implemented for this spatial backend.( R ( R R ( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyt convert_extent3dX s c C s t d � � d S( Ns: Aggregate method not implemented for this spatial backend.( R ( R t geom_valt
geom_field( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyt convert_geom[ s c C s d | S( Ns '%s'( ( R t name( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyt geo_quote_name_ s c C s
t � d S( si
Returns the database column type for the geometry field on
the spatial backend.
N( R ( R t f( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyt geo_db_typec s c C s t d � � d S( sv
Returns the distance parameters for the given geometry field,
lookup value, and lookup type.
s: Distance operations not available on this spatial backend.N( R ( R R t valuet lookup_type( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyt get_distancej s c C s
t � d S( s
Returns the placeholder for the given geometry field with the given
value. Depending on the spatial backend, the placeholder may contain a
stored procedure call to the transformation function of the spatial
backend.
N( R ( R R R ( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyt get_geom_placeholderq s c C sS x@ | j D]5 \ } } | | j k r
d t t | j | � � Sq
Wt d � � d S( sq
Helper method to return the quoted column string from the evaluator
for its expression.
s %s.%ss- Could not find the column for the expression.N( t colst
expressiont tuplet mapt
quote_namet Exception( R t evaluatort exprt col_tup( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyt get_expression_columnz s c C s t d � � d S( Ns; Aggregate support not implemented for this spatial backend.( R ( R t agg( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyt spatial_aggregate_sql� s c C s
t � d S( N( R ( R t lvalueR R t field( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyt spatial_lookup_sql� s c C s
t � d S( N( R ( R ( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyt geometry_columns� s c C s
t � d S( N( R ( R ( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyt spatial_ref_sys� s N(D t __name__t
__module__t __doc__t distance_functionst geometry_functionst geometry_operatorst geography_operatorst geography_functionst sett gis_termst truncate_paramst Falset postgist
spatialitet mysqlt oraclet Nonet spatial_versiont selectt geographyt geometryt areat centroidt
differencet distancet distance_spheret distance_spheroidt envelopet force_rhrt mem_sizet bounding_circlet num_geomt
num_pointst perimetert perimeter3dt point_on_surfacet
polygonizet reverset scalet snap_to_gridt sym_differencet transformt translatet uniont collectt extentt extent3dt make_linet unionaggt geohasht geojsont gmlt kmlt svgt from_textt from_wkbR R R R
R R R R R R" R# R$ ( ( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyR s~ t SpatialRefSysMixinc B s e Z d Z e j d � Z e j d � Z e d � � Z e d � � Z e d � � Z
e d � � Z e d � � Z e d � � Z
e d � � Z e d
� � Z e d � � Z e d � � Z e d
� � Z e d � � Z e d � � Z e d � � Z e e d � � Z d � Z RS( s
The SpatialRefSysMixin is a class used by the database-dependent
SpatialRefSys objects to reduce redundnant code.
sO .+SPHEROID\[\"(?P<name>.+)\",(?P<major>\d+(\.\d+)?),(?P<flattening>\d{3}\.\d+),s� .+UNIT ?\["(?P<unit_name>[\w \'\(\)]+)", ?(?P<unit>[\d\.]+)(,AUTHORITY\["(?P<unit_auth_name>[\w \'\(\)]+)","(?P<unit_auth_val>\d+)"\])?\]([\w ]+)?(,AUTHORITY\["(?P<auth_name>[\w \'\(\)]+)","(?P<auth_val>\d+)"\])?\]$c C s� t j r� t | d � r% | j j � Sy t j | j � | _ | j SWn t k
rZ } n Xy t j | j � | _ | j SWn t k
r� } n Xt d | j | f � � n t d � � d S( sO
Returns a GDAL SpatialReference object, if GDAL is installed.
t _srss9 Could not get OSR SpatialReference from WKT: %s
Error:
%ss GDAL is not installed.N(
R t HAS_GDALt hasattrR^ t clonet SpatialReferencet wktt srsR t proj4text( R t msg( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyRd � s
c C s^ t j r | j j S| j j | j � } | rV t | j d � � t | j d � � f Sd Sd S( s�
Returns a tuple of the ellipsoid parameters:
(semimajor axis, semiminor axis, and inverse flattening).
t majort
flatteningN(
R R_ Rd t ellipsoidt spheroid_regext matchRc t floatt groupR5 ( R t m( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyRi � s
(c C s
| j j S( s Returns the projection name.( Rd R ( R ( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyR � s c C s | j d S( s5 Returns the spheroid name for this spatial reference.t spheroid( Rd ( R ( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyRo � s c C s | j d S( s- Returns the datum for this spatial reference.t datum( Rd ( R ( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyRp � s c C s' t j r | j j S| j j d � Sd S( s$ Is this Spatial Reference projected?t PROJCSN( R R_ Rd t projectedRc t
startswith( R ( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyRr � s
c C s' t j r | j j S| j j d � Sd S( s Is this Spatial Reference local?t LOCAL_CSN( R R_ Rd t localRc Rs ( R ( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyRu � s
c C s' t j r | j j S| j j d � Sd S( s% Is this Spatial Reference geographic?t GEOGCSN( R R_ Rd t
geographicRc Rs ( R ( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyRw � s
c C sF t j r | j j S| j r d S| j j | j � } | j d � Sd S( s Returns the linear units name.t unit_nameN(
R R_ Rd t linear_nameRw R5 t units_regexRk Rc Rm ( R Rn ( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyRy � s
c C sF t j r | j j S| j r d S| j j | j � } | j d � Sd S( s Returns the linear units.t unitN(
R R_ Rd t linear_unitsRw R5 Rz Rk Rc Rm ( R Rn ( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyR| s
c C sF t j r | j j S| j r d S| j j | j � } | j d � Sd S( s& Returns the name of the angular units.Rx N(
R R_ Rd t angular_nameRr R5 Rz Rk Rc Rm ( R Rn ( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyR} s
c C sF t j r | j j S| j r d S| j j | j � } | j d � Sd S( s Returns the angular units.R{ N(
R R_ Rd t
angular_unitsRr R5 Rz Rk Rc Rm ( R Rn ( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyR~ s
c C sC | j s | j r" | j | j f S| j r; | j | j f Sd Sd S( s* Returns a tuple of the units and the name.N( NN( Rr Ru R| Ry Rw R~ R} R5 ( R ( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyt units" s
c C sK t j r t j | � j S| j j | � } | j d � | j d � f Sd S( s�
Class method used by GeometryField on initialization to
retrive the units on the given WKT, without having to use
any of the database fields.
R{ Rx N( R R_ Rb R Rz Rk Rm ( t clsRc Rn ( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyt get_units, s c C s� t j r. t j | � } | j } | d } nX | j j | � } | r� t | j d � � t | j d � � f } | j d � } n d S| s� | | f St | � d k r� | d | d } } n | \ } } d | | | f Sd S(
s�
Class method used by GeometryField on initialization to
retrieve the `SPHEROID[..]` parameters from the given WKT.
Ro Rg Rh R i i i s SPHEROID["%s",%s,%s]N(
R R_ Rb Ri Rj Rk Rl Rm R5 t len( R� Rc t stringRd t
sphere_paramst sphere_nameRn t radiusRh ( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyt get_spheroid9 s
*
c C s/ y t j | j � SWn t j | j � SXd S( sp
Returns the string representation. If GDAL is installed,
it will be 'pretty' OGC WKT.
N( R t text_typeRd Rc ( R ( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyt __str__U s ( R% R& R' t ret compileRj Rz t propertyRd Ri R Ro Rp Rr Ru Rw Ry R| R} R~ R t classmethodR� t TrueR� R� ( ( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyR] � s(
( R' R� t django.contrib.gisR t django.utilsR t django.utils.encodingR t objectR R] ( ( ( sE /tmp/pip-install-XxeQeY/django/django/contrib/gis/db/backends/base.pyt <module> s �