メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.066372084482 42.9246188488395, 143.064689274411 42.924525406949, 143.064881810544 42.9234421877025, 143.06501543106 42.9226670204229, 143.065131712355 42.921992340006, 143.065383250822 42.9220102421715, 143.066297991289 42.9220799654717, 143.066393210802 42.9220872340655, 143.066327775651 42.9226544367244, 143.06660779964 42.9229667547202, 143.066372084482 42.9246188488395)) ^^http://www.opengis.net/ont/geosparql#wktLiteral