メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.391899387111 44.1689176990097, 142.389844741774 44.1686028040331, 142.389833725927 44.168658982839, 142.389072939307 44.1685302588424, 142.389106400042 44.168427977215, 142.389117044633 44.1683954596533, 142.389351755313 44.1677425633624, 142.390017251638 44.1678359283755, 142.390789924497 44.1679443099846, 142.391835592199 44.1681180273579, 142.392068627143 44.1681567303107, 142.392153454975 44.1681708122318, 142.391899387111 44.1689176990097)) ^^http://www.opengis.net/ont/geosparql#wktLiteral