メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.993274916531 34.8858972139563, 136.993526566119 34.886350436185, 136.994143921164 34.8874477597096, 136.993191125254 34.887537177562, 136.992483279913 34.8875085504842, 136.991882319615 34.8874738059358, 136.99186742056 34.8870173337878, 136.991837715083 34.8860542416151, 136.991825211876 34.8858939257923, 136.991914923895 34.8858477837011, 136.992423862153 34.8856646989185, 136.993012921398 34.8854384131316, 136.993274916531 34.8858972139563)) ^^http://www.opengis.net/ont/geosparql#wktLiteral