メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.372135840725 43.0755990538443, 141.372448653274 43.0756357010393, 141.37292662177 43.0757027298922, 141.373675169111 43.0758079766796, 141.373986695295 43.0758474940672, 141.37380812884 43.076219506405, 141.373665309731 43.0764998009034, 141.373493257809 43.0768250928899, 141.371882209698 43.0766112576482, 141.371834811789 43.0766047754333, 141.371230520043 43.0765285447835, 141.371275006209 43.0763427243444, 141.371386881932 43.0759325074772, 141.371475968154 43.0755527094444, 141.371490614428 43.0755079514612, 141.372135840725 43.0755990538443)) ^^http://www.opengis.net/ont/geosparql#wktLiteral