メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.366042318708 43.0771499141397, 141.365776380359 43.0771160722387, 141.365766804013 43.0771148027953, 141.365559300759 43.0770871775394, 141.365863282928 43.0759700218957, 141.366626490106 43.0760621366789, 141.366990711595 43.0761060888668, 141.367678881326 43.0761994470724, 141.36756477036 43.0766967807287, 141.367438465363 43.0770143289779, 141.367318784419 43.0773246841175, 141.367246496363 43.0773144917999, 141.366879968482 43.0772636307136, 141.366419798213 43.0771997380779, 141.366270812497 43.0771790364475, 141.366042318708 43.0771499141397)) ^^http://www.opengis.net/ont/geosparql#wktLiteral