メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.177508867808 34.7906261458839, 137.176320483768 34.7902318558622, 137.176224792846 34.7897135212177, 137.17591056299 34.7891613985628, 137.175377783772 34.7885191447487, 137.175336782842 34.7883388547589, 137.175295760191 34.7880008084027, 137.176343925469 34.787836633586, 137.176975830014 34.7884401397773, 137.177945751587 34.7894091278656, 137.177508867808 34.7906261458839)) ^^http://www.opengis.net/ont/geosparql#wktLiteral