メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.651750223952 43.9367051516989, 141.651879444736 43.9372056902664, 141.652010992933 43.9377604197529, 141.65213493677 43.9382830795434, 141.651755808523 43.9383311181386, 141.651499851817 43.9383673708063, 141.650871578605 43.9384563658451, 141.65073224535 43.9378686069566, 141.650633511168 43.9373903915889, 141.650627523435 43.9373664906706, 141.650505638306 43.9368778462907, 141.650392406195 43.9363127094999, 141.651621202353 43.9361608923455, 141.651750223952 43.9367051516989)) ^^http://www.opengis.net/ont/geosparql#wktLiteral