メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.380789982188 43.7869521128186, 142.380071045985 43.7871547652381, 142.37941035262 43.7873663845649, 142.379151844722 43.7870473549407, 142.378826529924 43.786595824422, 142.378547177823 43.7862406538458, 142.378565779829 43.7862350776379, 142.379295157433 43.7860168994319, 142.380007848617 43.7858157540198, 142.380343899063 43.786425425282, 142.380389806586 43.7865006892059, 142.380410667875 43.7865307813391, 142.380789982188 43.7869521128186)) ^^http://www.opengis.net/ont/geosparql#wktLiteral