メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.283420228563 42.2941102979132, 143.283029136492 42.2941503929787, 143.281489799264 42.2952012971877, 143.280663383592 42.2937077038788, 143.281215647231 42.2935526437042, 143.28301767396 42.2931003498249, 143.283420228563 42.2941102979132)) ^^http://www.opengis.net/ont/geosparql#wktLiteral