メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.048335685354 42.9107477372656, 143.049086117686 42.9107930748701, 143.048931838818 42.911945208415, 143.048179760449 42.9118844089129, 143.047391372949 42.9118201995005, 143.047536922907 42.9106828974771, 143.048335685354 42.9107477372656)) ^^http://www.opengis.net/ont/geosparql#wktLiteral