メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.979655577067 36.8717203268092, 136.979625593343 36.8726959987928, 136.978154942299 36.8726677095636, 136.978206527221 36.8716730651495, 136.978235133344 36.8710237828397, 136.978287241639 36.8697344305925, 136.979745238365 36.8697719195897, 136.979699410896 36.8709392026271, 136.979655577067 36.8717203268092)) ^^http://www.opengis.net/ont/geosparql#wktLiteral