メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.356655956504 43.7572357548992, 142.357134940858 43.7575788734147, 142.357605173378 43.7578999518591, 142.356761245884 43.7585509403627, 142.356305626729 43.75893938472, 142.356290836553 43.7589492431347, 142.354962720952 43.7580171312679, 142.354757032407 43.7578741670538, 142.355790309819 43.7570852732025, 142.356085605362 43.7568548895042, 142.356311407736 43.7566718586252, 142.356543778007 43.7565124678799, 142.357072811068 43.756891789592, 142.356655956504 43.7572357548992)) ^^http://www.opengis.net/ont/geosparql#wktLiteral