メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.318703674057 43.0501769998506, 141.318331558132 43.0500271235077, 141.317926668953 43.0498694532636, 141.318159832637 43.0497088210181, 141.318462486297 43.0494490974711, 141.318793498672 43.0492543778827, 141.318989774647 43.0490659448424, 141.318855878225 43.0495426723974, 141.31875184554 43.0499849709773, 141.318703674057 43.0501769998506)) ^^http://www.opengis.net/ont/geosparql#wktLiteral