メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.414113551615 43.7411309647799, 142.414134568864 43.7416208773947, 142.412251906598 43.7417186740295, 142.410100297625 43.7418310524626, 142.410039984984 43.7413507199935, 142.409992778068 43.7408703522266, 142.412144325975 43.7407437030838, 142.414059765788 43.7406458618781, 142.414113551615 43.7411309647799)) ^^http://www.opengis.net/ont/geosparql#wktLiteral