メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.350519191548 43.0797757475637, 141.350333511172 43.0805182961228, 141.350216872174 43.0808963798874, 141.349275420287 43.0807744015849, 141.348616280494 43.0806890313773, 141.348760233034 43.0801043968, 141.348825267091 43.0798503192196, 141.348900961986 43.0795627072886, 141.350519191548 43.0797757475637)) ^^http://www.opengis.net/ont/geosparql#wktLiteral