メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.984415294798 43.5637472135624, 144.983713372354 43.5643013148864, 144.982920379347 43.5649074788751, 144.982044644534 43.5643523073856, 144.982817548805 43.5637252886532, 144.983539902978 43.5631440194344, 144.983556212132 43.5631710886157, 144.984415294798 43.5637472135624)) ^^http://www.opengis.net/ont/geosparql#wktLiteral