ó J~‰Pc@sxdZddlZddlmZddlmZddlmZdefd„ƒYZ edefd „ƒYƒZ dS( sk Base/mixin classes for the spatial backend database operations and the `SpatialRefSys` model the backend. iÿÿÿÿN(tgdal(tsix(tpython_2_unicode_compatibletBaseSpatialOperationscBs¦eZdZiZiZiZiZiZiZiZ e Z e Z e Z e Zd Zd Ze Ze Ze Ze Ze Ze Ze Ze Ze Ze Ze Ze Ze Ze Ze Z e Z!e Z"e Z#e Z$e Z%e Z&e Z'e Z(e Z)e Z*e Z+e Z,e Z-e Z.e Z/e Z0e Z1e Z2e Z3e Z4e Z5e Z6d„Z7d„Z8d„Z9d„Z:d„Z;d„Z<d„Z=d„Z>d „Z?d „Z@d „ZAd „ZBRS(sš This module holds the base `BaseSpatialBackend` object, which is instantiated by each spatial database backend with the features it has. cCstdƒ‚dS(Ns:Aggregate extent not implemented for this spatial backend.(tNotImplementedError(tselftbox((s<../Django//lib/python/django/contrib/gis/db/backends/base.pytconvert_extentSscCstdƒ‚dS(Ns=Aggregate 3D extent not implemented for this spatial backend.(R(RR((s<../Django//lib/python/django/contrib/gis/db/backends/base.pytconvert_extent3dVscCstdƒ‚dS(Ns:Aggregate method not implemented for this spatial backend.(R(Rtgeom_valt geom_field((s<../Django//lib/python/django/contrib/gis/db/backends/base.pyt convert_geomYscCsd|S(Ns'%s'((Rtname((s<../Django//lib/python/django/contrib/gis/db/backends/base.pytgeo_quote_name]scCs t‚dS(si Returns the database column type for the geometry field on the spatial backend. N(R(Rtf((s<../Django//lib/python/django/contrib/gis/db/backends/base.pyt geo_db_typeascCstdƒ‚dS(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(RRtvaluet lookup_type((s<../Django//lib/python/django/contrib/gis/db/backends/base.pyt get_distancehscCs t‚dS(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(RRR((s<../Django//lib/python/django/contrib/gis/db/backends/base.pytget_geom_placeholderoscCsSx@|jD]5\}}||jkr dtt|j|ƒƒSq Wtdƒ‚dS(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(tcolst expressionttupletmapt quote_namet Exception(Rt evaluatortexprtcol_tup((s<../Django//lib/python/django/contrib/gis/db/backends/base.pytget_expression_columnxscCstdƒ‚dS(Ns;Aggregate support not implemented for this spatial backend.(R(Rtagg((s<../Django//lib/python/django/contrib/gis/db/backends/base.pytspatial_aggregate_sqlƒscCs t‚dS(N(R(RtlvalueRRtfield((s<../Django//lib/python/django/contrib/gis/db/backends/base.pytspatial_lookup_sql†scCs t‚dS(N(R(R((s<../Django//lib/python/django/contrib/gis/db/backends/base.pytgeometry_columnsŠscCs t‚dS(N(R(R((s<../Django//lib/python/django/contrib/gis/db/backends/base.pytspatial_ref_syssN(Ct__name__t __module__t__doc__tdistance_functionstgeometry_functionstgeometry_operatorstgeography_operatorstgeography_functionst gis_termsttruncate_paramstFalsetpostgist spatialitetmysqltoracletNonetspatial_versiontselectt geographytgeometrytareatcentroidt differencetdistancetdistance_spheretdistance_spheroidtenvelopet force_rhrtmem_sizetbounding_circletnum_geomt num_pointst perimetert perimeter3dtpoint_on_surfacet polygonizetreversetscalet snap_to_gridtsym_differencet transformt translatetuniontcollecttextenttextent3dt make_linetunionaggtgeohashtgeojsontgmltkmltsvgt from_texttfrom_wkbRRR R RRRRRR"R#R$(((s<../Django//lib/python/django/contrib/gis/db/backends/base.pyR s~         tSpatialRefSysMixincBseZdZejdƒZejdƒZed„ƒZed„ƒZ ed„ƒZ ed„ƒZ ed„ƒZ ed„ƒZ ed „ƒZed „ƒZed „ƒZed „ƒZed „ƒZed„ƒZed„ƒZed„ƒZeed„ƒZd„ZRS(s The SpatialRefSysMixin is a class used by the database-dependent SpatialRefSys objects to reduce redundnant code. sO.+SPHEROID\[\"(?P.+)\",(?P\d+(\.\d+)?),(?P\d{3}\.\d+),s×.+UNIT ?\["(?P[\w \'\(\)]+)", ?(?P[\d\.]+)(,AUTHORITY\["(?P[\w \'\(\)]+)","(?P\d+)"\])?\]([\w ]+)?(,AUTHORITY\["(?P[\w \'\(\)]+)","(?P\d+)"\])?\]$cCs½tjr­t|dƒr%|jjƒSy tj|jƒ|_|jSWntk rZ}nXy tj|j ƒ|_|jSWntk r}nXtd|j|fƒ‚n tdƒ‚dS(sO Returns a GDAL SpatialReference object, if GDAL is installed. t_srss9Could not get OSR SpatialReference from WKT: %s Error: %ssGDAL is not installed.N( RtHAS_GDALthasattrR]tclonetSpatialReferencetwkttsrsRt proj4text(Rtmsg((s<../Django//lib/python/django/contrib/gis/db/backends/base.pyRc¢s    cCs^tjr|jjS|jj|jƒ}|rVt|jdƒƒt|jdƒƒfSdSdS(s€ Returns a tuple of the ellipsoid parameters: (semimajor axis, semiminor axis, and inverse flattening). tmajort flatteningN( RR^Rct ellipsoidtspheroid_regextmatchRbtfloattgroupR4(Rtm((s<../Django//lib/python/django/contrib/gis/db/backends/base.pyRhÀs   (cCs |jjS(sReturns the projection name.(RcR (R((s<../Django//lib/python/django/contrib/gis/db/backends/base.pyR ÍscCs |jdS(s5Returns the spheroid name for this spatial reference.tspheroid(Rc(R((s<../Django//lib/python/django/contrib/gis/db/backends/base.pyRnÒscCs |jdS(s-Returns the datum for this spatial reference.tdatum(Rc(R((s<../Django//lib/python/django/contrib/gis/db/backends/base.pyRo×scCs'tjr|jjS|jjdƒSdS(s$Is this Spatial Reference projected?tPROJCSN(RR^Rct projectedRbt startswith(R((s<../Django//lib/python/django/contrib/gis/db/backends/base.pyRqÜs  cCs'tjr|jjS|jjdƒSdS(s Is this Spatial Reference local?tLOCAL_CSN(RR^RctlocalRbRr(R((s<../Django//lib/python/django/contrib/gis/db/backends/base.pyRtäs  cCs'tjr|jjS|jjdƒSdS(s%Is this Spatial Reference geographic?tGEOGCSN(RR^Rct geographicRbRr(R((s<../Django//lib/python/django/contrib/gis/db/backends/base.pyRvìs  cCsFtjr|jjS|jr dS|jj|jƒ}|j dƒSdS(sReturns the linear units name.t unit_nameN( RR^Rct linear_nameRvR4t units_regexRjRbRl(RRm((s<../Django//lib/python/django/contrib/gis/db/backends/base.pyRxôs    cCsFtjr|jjS|jr dS|jj|jƒ}|j dƒSdS(sReturns the linear units.tunitN( RR^Rct linear_unitsRvR4RyRjRbRl(RRm((s<../Django//lib/python/django/contrib/gis/db/backends/base.pyR{ÿs    cCsFtjr|jjS|jr dS|jj|jƒ}|j dƒSdS(s&Returns the name of the angular units.RwN( RR^Rct angular_nameRqR4RyRjRbRl(RRm((s<../Django//lib/python/django/contrib/gis/db/backends/base.pyR| s    cCsFtjr|jjS|jr dS|jj|jƒ}|j dƒSdS(sReturns the angular units.RzN( RR^Rct angular_unitsRqR4RyRjRbRl(RRm((s<../Django//lib/python/django/contrib/gis/db/backends/base.pyR}s    cCsC|js|jr"|j|jfS|jr;|j|jfSdSdS(s*Returns a tuple of the units and the name.N(NN(RqRtR{RxRvR}R|R4(R((s<../Django//lib/python/django/contrib/gis/db/backends/base.pytunits s  cCsKtjrtj|ƒjS|jj|ƒ}|jdƒ|jdƒfSdS(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. RzRwN(RR^RaR~RyRjRl(tclsRbRm((s<../Django//lib/python/django/contrib/gis/db/backends/base.pyt get_units*s c Csátjr.tj|ƒ}|j}|d}nX|jj|ƒ}|r‚t|jdƒƒt|jdƒƒf}|jdƒ}nd S|s–||fSt |ƒdkrÀ|d|d}}n |\}}d|||fSd S( sŒ Class method used by GeometryField on initialization to retrieve the `SPHEROID[..]` parameters from the given WKT. RnRfRgR iiisSPHEROID["%s",%s,%s]N( RR^RaRhRiRjRkRlR4tlen( RRbtstringRct sphere_paramst sphere_nameRmtradiusRg((s<../Django//lib/python/django/contrib/gis/db/backends/base.pyt get_spheroid7s   *  cCs/ytj|jƒSWntj|jƒSXdS(sp Returns the string representation. If GDAL is installed, it will be 'pretty' OGC WKT. N(Rt text_typeRcRb(R((s<../Django//lib/python/django/contrib/gis/db/backends/base.pyt__str__Ss(R%R&R'tretcompileRiRytpropertyRcRhR RnRoRqRtRvRxR{R|R}R~t classmethodR€tTrueR†Rˆ(((s<../Django//lib/python/django/contrib/gis/db/backends/base.pyR\s(       ( R'R‰tdjango.contrib.gisRt django.utilsRtdjango.utils.encodingRtobjectRR\(((s<../Django//lib/python/django/contrib/gis/db/backends/base.pyts †