メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.368329362033 43.1078358916704, 141.368296689709 43.1079852929486, 141.368186764571 43.1084539405894, 141.366651167447 43.1082397189828, 141.366800234908 43.1076533687559, 141.366953956378 43.107130276468, 141.368443887253 43.107314254968, 141.368358944652 43.1076543279831, 141.368340455009 43.1077854128718, 141.368329362033 43.1078358916704)) ^^http://www.opengis.net/ont/geosparql#wktLiteral