メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.376096451138 43.7788556500299, 142.375430715196 43.7790320895785, 142.374697372079 43.7792342307849, 142.374185314734 43.7783239999897, 142.373928205939 43.7778681107205, 142.374665831687 43.7776439419197, 142.375310517562 43.7774565245765, 142.375611194391 43.7779851289057, 142.376096451138 43.7788556500299)) ^^http://www.opengis.net/ont/geosparql#wktLiteral