メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.926924077394 43.5960746637873, 141.927241706369 43.596696779389, 141.925738127798 43.5970783196335, 141.924123607913 43.5975028452377, 141.923620152508 43.5971754812362, 141.923374222098 43.5969870596139, 141.923210464888 43.5968298136117, 141.922888027426 43.5966184967215, 141.922780885067 43.5964861629905, 141.923553980652 43.5962903236563, 141.925174005086 43.5958946871593, 141.926643822373 43.5955072571517, 141.926781505968 43.5957819349112, 141.926924077394 43.5960746637873)) ^^http://www.opengis.net/ont/geosparql#wktLiteral