メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.326780680592 43.0712100539099, 141.32672035532 43.071496650358, 141.326648487689 43.0717788630908, 141.325819541965 43.0716702560098, 141.325691671788 43.0716506550167, 141.325106083446 43.0715691185102, 141.325137873681 43.0714390553208, 141.325243696571 43.0710043626333, 141.325401164905 43.0704332271221, 141.326433656203 43.0705738646293, 141.326912016398 43.0706406740768, 141.326780680592 43.0712100539099)) ^^http://www.opengis.net/ont/geosparql#wktLiteral