vลฯ^zใ@s'ddlmZGdd„dƒZdS)้)ฺgdalc@s3eZdZdZedd„ƒZedd„ƒZedd„ƒZedd „ƒZed d „ƒZ ed d „ƒZ edd„ƒZ edd„ƒZ edd„ƒZ edd„ƒZedd„ƒZedd„ƒZedd„ƒZedd„ƒZeddd „ƒZd!d"„Zd#S)$ฺSpatialRefSysMixinz~ The SpatialRefSysMixin is a class used by the database-dependent SpatialRefSys objects to reduce redundant code. c Csีt|dƒr|jjƒSy tj|jƒ|_|jSWn+tk ri}z |}WYdd}~XnXy tj|jƒ|_|jSWn+tk rท}z |}WYdd}~XnXtd|j|fƒ‚dS)z8 Return a GDAL SpatialReference object. ฺ_srsNz9Could not get OSR SpatialReference from WKT: %s Error: %s) ฺhasattrrฺclonerฺSpatialReferenceฺwktฺsrsฺ ExceptionZ proj4text)ฺselfฺeฺmsgฉr๚L/tmp/pip-build-8lau8j11/django/django/contrib/gis/db/backends/base/models.pyr s   zSpatialRefSysMixin.srscCs |jjS)z Return a tuple of the ellipsoid parameters: (semimajor axis, semiminor axis, and inverse flattening). )r ฺ ellipsoid)r rrrr$szSpatialRefSysMixin.ellipsoidcCs |jjS)zReturn the projection name.)r ฺname)r rrrr,szSpatialRefSysMixin.namecCs |jdS)z4Return the spheroid name for this spatial reference.ฺspheroid)r )r rrrr1szSpatialRefSysMixin.spheroidcCs |jdS)z,Return the datum for this spatial reference.ฺdatum)r )r rrrr6szSpatialRefSysMixin.datumcCs |jjS)z$Is this Spatial Reference projected?)r ฺ projected)r rrrr;szSpatialRefSysMixin.projectedcCs |jjS)z Is this Spatial Reference local?)r ฺlocal)r rrrr@szSpatialRefSysMixin.localcCs |jjS)z%Is this Spatial Reference geographic?)r ฺ geographic)r rrrrEszSpatialRefSysMixin.geographiccCs |jjS)zReturn the linear units name.)r ฺ linear_name)r rrrrJszSpatialRefSysMixin.linear_namecCs |jjS)zReturn the linear units.)r ฺ linear_units)r rrrrOszSpatialRefSysMixin.linear_unitscCs |jjS)z%Return the name of the angular units.)r ฺ angular_name)r rrrrTszSpatialRefSysMixin.angular_namecCs |jjS)zReturn the angular units.)r ฺ angular_units)r rrrrYsz SpatialRefSysMixin.angular_unitscCsC|js|jr"|j|jfS|jr;|j|jfSdSdS)z)Return a tuple of the units and the name.N)NN)rrrrrrr)r rrrฺunits^s  zSpatialRefSysMixin.unitscCstj|ƒjS)z Return a tuple of (unit_value, unit_name) for the given WKT without using any of the database fields. )rrr)ฺclsrrrrฺ get_unitshszSpatialRefSysMixin.get_unitsTcCs}tj|ƒ}|j}|d}|s2||fSt|ƒdkr\|d|d}}n |\}}d|||fSdS)zŒ Class method used by GeometryField on initialization to retrieve the `SPHEROID[..]` parameters from the given WKT. r้r้zSPHEROID["%s",%s,%s]N)rrrฺlen)rrฺstringr Z sphere_paramsZ sphere_nameZradiusZ flatteningrrrฺ get_spheroidps    zSpatialRefSysMixin.get_spheroidcCs t|jƒS)zG Return the string representation, a 'pretty' OGC WKT. )ฺstrr )r rrrฺ__str__„szSpatialRefSysMixin.__str__N)ฺ__name__ฺ __module__ฺ __qualname__ฺ__doc__ฺpropertyr rrrrrrrrrrrrฺ classmethodrr"r$rrrrrs$  rN)Zdjango.contrib.gisrrrrrrฺs