メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.385448301934 43.1580147349254, 141.386053700465 43.1579677060716, 141.386225063076 43.1587535371604, 141.38631830727 43.1591587108478, 141.384250253166 43.1593358616781, 141.384180409476 43.1589208751811, 141.384063313901 43.1581306680635, 141.384533762946 43.158095772357, 141.384987954458 43.1580555480182, 141.385057602396 43.1580486923711, 141.385448301934 43.1580147349254)) ^^http://www.opengis.net/ont/geosparql#wktLiteral