メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.331107273892 43.0784131519374, 141.33073240123 43.0792621735043, 141.330649425882 43.0794793159234, 141.330605392601 43.0795945119925, 141.329932637141 43.0795751729771, 141.329417647583 43.0795727843126, 141.329435409237 43.0788028953118, 141.329444848933 43.0784030801739, 141.330334601627 43.0784102429154, 141.330535235818 43.0784153733442, 141.331107273892 43.0784131519374)) ^^http://www.opengis.net/ont/geosparql#wktLiteral