メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.261749982858 44.0286040894646, 144.261575671998 44.0286830231086, 144.261215264392 44.0292070671, 144.260014454095 44.028782656316, 144.260444098141 44.0281443994629, 144.261749982858 44.0286040894646)) ^^http://www.opengis.net/ont/geosparql#wktLiteral