メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.357025010277 43.053903470702, 141.357008876259 43.0539842945505, 141.357004949462 43.0540037447082, 141.356951397116 43.0542708619163, 141.356661272349 43.0542323059448, 141.355306563582 43.0540523642963, 141.355411714906 43.0536796619972, 141.355469050195 43.0534764386927, 141.355618291318 43.0529075812842, 141.357210240443 43.0531203159056, 141.357064501789 43.0537065735562, 141.357036998237 43.0538439245494, 141.357025010277 43.053903470702)) ^^http://www.opengis.net/ont/geosparql#wktLiteral