メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.939566583255 34.8901932148208, 136.939485864072 34.8909779424447, 136.937404904844 34.890864869659, 136.937417139949 34.8907677693116, 136.937432629228 34.8906447557446, 136.938813118481 34.8901404617274, 136.939566583255 34.8901932148208)) ^^http://www.opengis.net/ont/geosparql#wktLiteral