メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.747640272754 43.2006735513136, 141.747642952235 43.2006749691773, 141.748124417829 43.2009176023752, 141.747496863575 43.2015378155179, 141.746793799968 43.2022960997178, 141.746317506739 43.2020667759942, 141.745866374235 43.2018355946282, 141.74659387118 43.201076014242, 141.747212117054 43.2004485194908, 141.747640272754 43.2006735513136)) ^^http://www.opengis.net/ont/geosparql#wktLiteral