メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.887150224186 43.8037692908391, 143.887441631196 43.8036247549534, 143.888262069333 43.8044907715528, 143.888626931381 43.8048662118559, 143.888591172742 43.8051774504182, 143.887916594504 43.8051365157633, 143.887124922408 43.8050884655644, 143.887091852677 43.8050864427971, 143.886419720817 43.8050353553, 143.886450321427 43.8047409808069, 143.886490563905 43.8043518350912, 143.886521411221 43.8041019863861, 143.886634539461 43.8040421579054, 143.887150224186 43.8037692908391)) ^^http://www.opengis.net/ont/geosparql#wktLiteral