メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.392572919594 43.7963870540588, 142.392102446421 43.7962704242351, 142.39031064031 43.7958119303976, 142.391735958225 43.7946757852646, 142.391971725689 43.7944826554857, 142.392576165083 43.7939970376399, 142.393148694539 43.7935073961078, 142.394336771683 43.79249682898, 142.395944271445 43.7935050619225, 142.392572919594 43.7963870540588)) ^^http://www.opengis.net/ont/geosparql#wktLiteral