メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.352076651798 43.0605388204256, 141.351860243942 43.0614145541294, 141.351470916977 43.0613624765831, 141.351519183516 43.0612099597128, 141.35143684585 43.0611801259517, 141.3514531764 43.0611127377574, 141.35109511886 43.0610673042701, 141.351150675405 43.060829463498, 141.350397936638 43.0607313440844, 141.35050756853 43.0602982011064, 141.350745552403 43.0593712276657, 141.352320177215 43.0595854430179, 141.352076651798 43.0605388204256)) ^^http://www.opengis.net/ont/geosparql#wktLiteral