メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.335398033385 43.0881938249969, 141.335677930854 43.0882330566449, 141.335454049423 43.0891304898563, 141.334553690979 43.0890069581924, 141.333960867915 43.088935748, 141.333987203524 43.0888491735702, 141.334092418125 43.0888010679028, 141.334817201884 43.0880587859384, 141.335515537656 43.0874098257611, 141.335964406534 43.0876492988036, 141.335398033385 43.0881938249969)) ^^http://www.opengis.net/ont/geosparql#wktLiteral