メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.748973379141 35.4065502754409, 136.748671788259 35.4065903620312, 136.748648985688 35.4065335247861, 136.748323277763 35.4065801462676, 136.748133161301 35.4056533832867, 136.748039102836 35.405196589635, 136.748674351192 35.4051173755196, 136.748973379141 35.4065502754409)) ^^http://www.opengis.net/ont/geosparql#wktLiteral