メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.329138076608 43.7684808591579, 142.328786224942 43.7690898757102, 142.328448245985 43.7696339057907, 142.328141991744 43.7695445448363, 142.327837849959 43.7694436214192, 142.327832337695 43.7694417925493, 142.32767783539 43.7693905238855, 142.326760984074 43.7691155551317, 142.326260701519 43.7689629429517, 142.326425985003 43.7686162523072, 142.326595928143 43.7682686798009, 142.326878651147 43.7678047372111, 142.327700443082 43.7680331460763, 142.328127253676 43.7681628269226, 142.32864655581 43.7683405047461, 142.329138076608 43.7684808591579)) ^^http://www.opengis.net/ont/geosparql#wktLiteral