メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.373384504171 43.7416869734169, 142.374000057369 43.7418716440809, 142.373777218183 43.742280240119, 142.373584192644 43.7426207326612, 142.373170374404 43.74340023155, 142.373003250806 43.7437102806096, 142.372706192103 43.7442092474632, 142.371407778575 43.7438059583525, 142.371475208613 43.7436786057216, 142.371824917738 43.7430624143218, 142.372273534522 43.7422472826683, 142.372705002512 43.7414878630583, 142.373384504171 43.7416869734169)) ^^http://www.opengis.net/ont/geosparql#wktLiteral