メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.35184142101 43.0439924429697, 141.351620837199 43.044488365453, 141.35155056789 43.0446252381117, 141.351463659928 43.0448771806928, 141.350803204391 43.0448426642661, 141.350288100548 43.0448157579747, 141.350320121559 43.0445602195237, 141.350421943888 43.0438980199137, 141.350455960219 43.0436304705189, 141.350459449742 43.0435228220733, 141.3510004634 43.0435541514728, 141.351192669911 43.0435638905798, 141.351453193543 43.0435770493537, 141.352063964734 43.043611734765, 141.35184142101 43.0439924429697)) ^^http://www.opengis.net/ont/geosparql#wktLiteral