メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.920215510425 35.4806829727289, 136.92027679529 35.4809884854136, 136.920401478701 35.4815201847566, 136.919890485138 35.4815867443864, 136.919763621159 35.4810083499214, 136.919725863104 35.4810098220354, 136.919085044741 35.4810953373432, 136.919050221372 35.4805114282462, 136.920230666214 35.480503355709, 136.920215510425 35.4806829727289)) ^^http://www.opengis.net/ont/geosparql#wktLiteral