メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.050194867351 43.5566179319559, 142.049956277348 43.5566122767706, 142.049189961103 43.5565635725426, 142.047874290222 43.5564666035824, 142.047988924304 43.5557121656675, 142.048964951126 43.5552318164013, 142.049370374066 43.5555936380385, 142.049160239931 43.5557247385923, 142.049592796324 43.556109392023, 142.049946112728 43.5564097629844, 142.050194867351 43.5566179319559)) ^^http://www.opengis.net/ont/geosparql#wktLiteral