メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.372708257614 43.1107978517638, 141.372569511129 43.1113240225206, 141.37095862141 43.1110844485653, 141.371095344408 43.1105597415417, 141.37107513428 43.1105567033458, 141.371197774353 43.110103763303, 141.37177619201 43.1101861206699, 141.372284322581 43.1102701164954, 141.372822630778 43.11035166954, 141.372708257614 43.1107978517638)) ^^http://www.opengis.net/ont/geosparql#wktLiteral