メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.448820144884 43.0454225690689, 141.448940638726 43.0458015109078, 141.449075644967 43.0462408987656, 141.449269654884 43.0468584948025, 141.448118884568 43.0470589718671, 141.447202776282 43.0472099512424, 141.447017264889 43.0466148479902, 141.446854495822 43.0461364420404, 141.446768870727 43.0458639420313, 141.446634835137 43.0454582485776, 141.446417072688 43.0449509019075, 141.448529709337 43.044507853032, 141.448673160152 43.0450087692261, 141.448820144884 43.0454225690689)) ^^http://www.opengis.net/ont/geosparql#wktLiteral