メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.877186775362 43.0099238652574, 142.87710078873 43.0098696896092, 142.877096014163 43.0098667612054, 142.876998952807 43.009807231238, 142.876411614938 43.0094468370387, 142.876307706153 43.0093830534773, 142.877256011653 43.0085445352731, 142.878040848446 43.0090218558329, 142.878144303685 43.0090879610962, 142.877186775362 43.0099238652574)) ^^http://www.opengis.net/ont/geosparql#wktLiteral