メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.405647206574 43.1251793379893, 141.406385732654 43.1254118551122, 141.40682051125 43.1255713584128, 141.406492008095 43.125810843175, 141.406349937023 43.1259827933147, 141.406052286761 43.1263103450638, 141.40579300388 43.1266196847838, 141.40552179455 43.1269164162044, 141.40525518192 43.1272346304582, 141.404267605812 43.1267276535548, 141.40305043385 43.1260769661897, 141.403317482125 43.1257763434395, 141.403581791638 43.1254651505305, 141.403845632987 43.1251877792974, 141.404142526691 43.1248666988351, 141.404415986737 43.1245598595987, 141.405137692427 43.1249113216151, 141.405647206574 43.1251793379893)) ^^http://www.opengis.net/ont/geosparql#wktLiteral