メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.550819837273 39.3119621668173, 140.550820172448 39.3119632936275, 140.551239129046 39.3134218417823, 140.548158875957 39.3139282027058, 140.547749234412 39.3125220238978, 140.547258736071 39.3109007165365, 140.549025015707 39.3105928665384, 140.550313315338 39.3103539905024, 140.550819837273 39.3119621668173)) ^^http://www.opengis.net/ont/geosparql#wktLiteral