メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.52312015967 43.8572441773848, 141.523069186283 43.8573163445054, 141.522955131972 43.8572730312994, 141.521686674422 43.8568151924378, 141.521693016363 43.8567731199677, 141.521584496377 43.8567464366337, 141.521818609472 43.8562709371915, 141.521841183288 43.8562245638942, 141.522622271608 43.8565134176601, 141.523081099112 43.8566830828592, 141.523063201656 43.8567084769491, 141.523406052608 43.8568373815753, 141.523367316289 43.8568941908158, 141.52312015967 43.8572441773848)) ^^http://www.opengis.net/ont/geosparql#wktLiteral