メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.381459107854 43.7695594593651, 142.380754186648 43.7695221265555, 142.380447932018 43.7689811858059, 142.380421352537 43.7689190518778, 142.381762960763 43.7685623703996, 142.381908978904 43.7685308761708, 142.381953349701 43.768526254733, 142.382326887573 43.7691713994343, 142.381559141642 43.7693393257779, 142.381363010235 43.7694076727651, 142.381459107854 43.7695594593651)) ^^http://www.opengis.net/ont/geosparql#wktLiteral