メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.356334769151 43.0907131888214, 141.356145822548 43.0914911602922, 141.356032785595 43.0919389703473, 141.355063091471 43.0918073324001, 141.354487330499 43.0917278575426, 141.354596702894 43.0912885294243, 141.354680711232 43.0908907072995, 141.35473844541 43.0906626627606, 141.354878642003 43.0901097136965, 141.355451465213 43.0901857876593, 141.356426178846 43.0903203469345, 141.356334769151 43.0907131888214)) ^^http://www.opengis.net/ont/geosparql#wktLiteral