メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.05896257529 42.9121282986097, 143.05896042894 42.9121471624157, 143.058895049172 42.9126569715268, 143.058609082935 42.9126300140584, 143.057253315109 42.9125321768968, 143.056442434413 42.9124759246622, 143.056601271547 42.9113100317661, 143.057383986353 42.9113646525877, 143.059036899079 42.9114831061553, 143.058968853334 42.9120743793863, 143.05896257529 42.9121282986097)) ^^http://www.opengis.net/ont/geosparql#wktLiteral