メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.028670169362 35.2089447307568, 137.028706552615 35.2092444923301, 137.028434529796 35.2091262207925, 137.028407812431 35.2090940769852, 137.028414063912 35.2089365463447, 137.028670169362 35.2089447307568)) ^^http://www.opengis.net/ont/geosparql#wktLiteral