メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.346322728697 43.0312896247411, 141.346283933354 43.031575070514, 141.346225371322 43.0320053805597, 141.34475870516 43.0318994748113, 141.344775917732 43.0317915134055, 141.344796688839 43.0314871467954, 141.344818374357 43.0311856717303, 141.344831457363 43.0311434365966, 141.34486307434 43.0307924573032, 141.346369414078 43.0309106319532, 141.346322728697 43.0312896247411)) ^^http://www.opengis.net/ont/geosparql#wktLiteral