メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.349857021212 43.1276358914844, 141.350136377865 43.1279344418458, 141.350384633207 43.1281997647994, 141.350756685205 43.1285681735869, 141.3492941861 43.1293385355213, 141.348986774031 43.1290673302311, 141.348888653417 43.1289814637354, 141.348608517694 43.1287362118817, 141.348427072249 43.1285772530201, 141.347795907108 43.128030841357, 141.34894415089 43.1274165498444, 141.349390477558 43.1271777088972, 141.349857021212 43.1276358914844)) ^^http://www.opengis.net/ont/geosparql#wktLiteral