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1 row where page = "spatialite" and title = "Spatial indexing latitude/longitude columns"

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spatialite:spatial-indexing-latitude-longitude-columns spatialite spatial-indexing-latitude-longitude-columns Spatial indexing latitude/longitude columns Here's a recipe for taking a table with existing latitude and longitude columns, adding a SpatiaLite POINT geometry column to that table, populating the new column and then populating a spatial index: import sqlite3 conn = sqlite3.connect("museums.db") # Lead the spatialite extension: conn.enable_load_extension(True) conn.load_extension("/usr/local/lib/mod_spatialite.dylib") # Initialize spatial metadata for this database: conn.execute("select InitSpatialMetadata(1)") # Add a geometry column called point_geom to our museums table: conn.execute( "SELECT AddGeometryColumn('museums', 'point_geom', 4326, 'POINT', 2);" ) # Now update that geometry column with the lat/lon points conn.execute( """ UPDATE museums SET point_geom = GeomFromText('POINT('||"longitude"||' '||"latitude"||')',4326); """ ) # Now add a spatial index to that column conn.execute( 'select CreateSpatialIndex("museums", "point_geom");' ) # If you don't commit your changes will not be persisted: conn.commit() conn.close() ["SpatiaLite"] []

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