メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.40614859234 43.7425088090404, 142.406192266984 43.7430081705181, 142.406195049613 43.7430434150529, 142.405479777373 43.7430801908558, 142.403842693157 43.7431745895655, 142.402152591131 43.7432613333395, 142.402108968863 43.7427696700706, 142.402090316735 43.7427293660298, 142.402046801555 43.7422799465415, 142.403739523184 43.742195099702, 142.405384826368 43.7420916566233, 142.406094407735 43.7420478927635, 142.40614859234 43.7425088090404)) ^^http://www.opengis.net/ont/geosparql#wktLiteral