メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.335535385894 43.0414185288371, 141.336335711347 43.0414645885435, 141.336279238731 43.0419360514801, 141.336266813881 43.0419915131013, 141.33622352617 43.0423563202389, 141.336219984881 43.0424010915396, 141.33617875558 43.042627083623, 141.334504519083 43.0425359839634, 141.334492165731 43.0424962195128, 141.334518861916 43.0422678612795, 141.334574743979 43.0418369749574, 141.334635622088 43.0413666735825, 141.335535385894 43.0414185288371)) ^^http://www.opengis.net/ont/geosparql#wktLiteral