メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.048179760449 42.9118844089129, 143.048931838818 42.911945208415, 143.048782546943 42.9130577794121, 143.048024217068 42.9130067268538, 143.04723583584 42.9129515193919, 143.047391372949 42.9118201995005, 143.048179760449 42.9118844089129)) ^^http://www.opengis.net/ont/geosparql#wktLiteral