メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.97106313052 43.5594543400874, 144.970661443039 43.5591922327724, 144.97065985483 43.5591913210193, 144.970168887303 43.5588919950538, 144.971086250701 43.5581778312214, 144.971618446141 43.5585380859402, 144.971694090718 43.5585902530222, 144.971760350961 43.5586358228886, 144.97195235871 43.5587682283837, 144.97106313052 43.5594543400874)) ^^http://www.opengis.net/ont/geosparql#wktLiteral