メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.890154149928 43.01646022957, 142.890060777617 43.0164027990945, 142.888969829208 43.0157322418021, 142.889947256613 43.0148771426736, 142.890674481296 43.0153360623506, 142.89105368838 43.0155807996482, 142.891112305555 43.0156186610868, 142.890154149928 43.01646022957)) ^^http://www.opengis.net/ont/geosparql#wktLiteral