PostGIS Cookbook.pdf
PostGISisaspatialdatabasethatintegratesadvancedstorageandanalysisofvectorandrasterdata,andisremarkablyflexibleandpowerful.PostGISprovidessupportforgeographicobjectstothePostgreSQLobject-relationaldatabaseandiscurrentlythemostpopularopensourcespatialdatabases
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