メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.047918503699 43.5651429185259, 142.047691646381 43.5649915681539, 142.047434995327 43.5648796863236, 142.047306765341 43.5647967937716, 142.047079405914 43.56479639082, 142.046872014527 43.5647384983919, 142.046707201268 43.5645099702636, 142.04675195044 43.5644309704755, 142.046753532278 43.5643159594538, 142.04790517183 43.5644040044936, 142.047918503699 43.5651429185259)) ^^http://www.opengis.net/ont/geosparql#wktLiteral