メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.052023003813 42.9174973698875, 143.052733093783 42.9175464837543, 143.052596195588 42.9185443315255, 143.051924027435 42.9184981867094, 143.051200652231 42.9184436040887, 143.051106588063 42.9184362430679, 143.051106839125 42.9184334991464, 143.051283733229 42.9171826004724, 143.051381135382 42.9171890926237, 143.052041118883 42.9172339193478, 143.052023003813 42.9174973698875)) ^^http://www.opengis.net/ont/geosparql#wktLiteral