メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.369105647839 43.7741426789931, 142.369964927436 43.7756947930311, 142.369443010683 43.7758270256292, 142.368965636907 43.7759479945734, 142.368264480449 43.7761288220929, 142.367970118311 43.775316591643, 142.367864720556 43.7750925666528, 142.367646634076 43.7745643408639, 142.367351489256 43.7740243430299, 142.3688330063 43.7735845532339, 142.369105647839 43.7741426789931)) ^^http://www.opengis.net/ont/geosparql#wktLiteral