メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.818832133242 35.2969908810892, 136.817680301531 35.2973377739354, 136.816481201991 35.2976982513158, 136.816414180774 35.2975090419216, 136.81614741522 35.2967019230516, 136.816185508997 35.2967020335614, 136.816811972828 35.2966709619565, 136.817440112284 35.2966147505877, 136.81746015101 35.296613752049, 136.818081806189 35.2965820966218, 136.818696120832 35.2965445711975, 136.818832133242 35.2969908810892)) ^^http://www.opengis.net/ont/geosparql#wktLiteral