メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.44380769045 43.0539648412386, 141.443939258034 43.0543685518487, 141.444270261998 43.0554279531836, 141.444364108008 43.0556732945151, 141.442612762633 43.0559564078582, 141.442532526468 43.0557378875372, 141.442394599092 43.0552893299177, 141.44205799146 43.0542756709348, 141.441895285183 43.0537683527502, 141.442113146964 43.0537229808089, 141.443644066278 43.0534642710265, 141.44380769045 43.0539648412386)) ^^http://www.opengis.net/ont/geosparql#wktLiteral