メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.410023841377 43.7478799436872, 142.410741992108 43.7478427313992, 142.410853395685 43.7488371311181, 142.410116360796 43.7488771653987, 142.408744520278 43.7489531765297, 142.407519221911 43.7490142045422, 142.406794309458 43.7490591945368, 142.406689168549 43.7480565714789, 142.407394822692 43.7480148785923, 142.40742603514 43.7480103003933, 142.408643759824 43.7479452405674, 142.410023841377 43.7478799436872)) ^^http://www.opengis.net/ont/geosparql#wktLiteral