メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.305290094658 43.7786133860228, 142.305029763201 43.7783587346991, 142.304969342228 43.7783003791203, 142.30550623493 43.7774961183418, 142.306441604325 43.7764054376432, 142.306764432139 43.7761749952515, 142.306839164741 43.7773981659758, 142.306883914592 43.7777033914569, 142.306913922434 43.7778130081806, 142.306652559142 43.7779321901862, 142.306060376589 43.7782081749325, 142.305290094658 43.7786133860228)) ^^http://www.opengis.net/ont/geosparql#wktLiteral