メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.331295148882 43.0779686351586, 141.331163802251 43.0782962979861, 141.331107273892 43.0784131519374, 141.330535235818 43.0784153733442, 141.330334601627 43.0784102429154, 141.329444848933 43.0784030801739, 141.329467750834 43.0774691543881, 141.330377580539 43.0775571455685, 141.331003154442 43.077522300525, 141.331489766636 43.0774835924661, 141.331295148882 43.0779686351586)) ^^http://www.opengis.net/ont/geosparql#wktLiteral