メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.328834632153 43.0661788916812, 141.329650522052 43.0663027723703, 141.329502075532 43.0668508482914, 141.329355681597 43.0674217968244, 141.32857542203 43.0673261911702, 141.327788082905 43.0672166679815, 141.327962447875 43.0666363836399, 141.328109211937 43.0660735276431, 141.328834632153 43.0661788916812)) ^^http://www.opengis.net/ont/geosparql#wktLiteral