メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.333810761279 43.7636435645581, 142.334586302031 43.7638806342368, 142.334620294998 43.7638914739181, 142.334018046112 43.7649184572202, 142.33395377298 43.7648987270752, 142.333216896914 43.7646652756599, 142.332434618553 43.7644208795334, 142.332899343172 43.7636320481704, 142.33302681039 43.7633955185471, 142.333810761279 43.7636435645581)) ^^http://www.opengis.net/ont/geosparql#wktLiteral