メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.837764487797 34.8991765124783, 136.837632865448 34.8997107659192, 136.837375097871 34.8996184978482, 136.836603546805 34.8993588094706, 136.836030567156 34.899176363369, 136.835645242527 34.8991376159425, 136.835854513064 34.8960200809517, 136.835861455678 34.8959991139061, 136.835857331693 34.8959780440057, 136.835836633699 34.8959378420491, 136.83826368303 34.8971504200311, 136.837764487797 34.8991765124783)) ^^http://www.opengis.net/ont/geosparql#wktLiteral