メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.20998150202 36.5874900010229, 137.210038962507 36.5890023904847, 137.209424047502 36.5890090618983, 137.20942442609 36.589673471531, 137.208126906882 36.5897093261104, 137.208035795527 36.5875273265462, 137.208011823518 36.5867277043927, 137.209354045602 36.5867166551441, 137.209339963249 36.5862924837186, 137.210484188588 36.5872198642561, 137.21079899345 36.5874734964567, 137.20998150202 36.5874900010229)) ^^http://www.opengis.net/ont/geosparql#wktLiteral