メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.45099565652 42.9209661807611, 143.450388107479 42.9209343360715, 143.45035435965 42.9212176521251, 143.450238195199 42.9222259885815, 143.449700453874 42.9221917818007, 143.449155560314 42.9221571127486, 143.448560551882 42.9221192537485, 143.448534596229 42.9220784835321, 143.449672250748 42.9211761416793, 143.449721026096 42.921137453264, 143.450861487131 42.9202328534674, 143.451126502098 42.9200206131093, 143.451018466597 42.9208013474291, 143.45099565652 42.9209661807611)) ^^http://www.opengis.net/ont/geosparql#wktLiteral