メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.334955724335 43.0523670441893, 141.334940560472 43.0524902807143, 141.334915909432 43.0526904520815, 141.334892796605 43.0528774844652, 141.333161771804 43.052768255449, 141.333233112387 43.0523249777636, 141.333288419495 43.0518890957918, 141.333911908976 43.051931295061, 141.334142220086 43.051946854344, 141.335000651116 43.0520028148607, 141.334980248264 43.0521689113123, 141.334955724335 43.0523670441893)) ^^http://www.opengis.net/ont/geosparql#wktLiteral