メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.570587292475 42.9805931240864, 141.570958697006 42.9805510870396, 141.571097806902 42.9809715117637, 141.571250151758 42.9813993292071, 141.571363775404 42.9817377357616, 141.571010076854 42.9817979542866, 141.569992297293 42.9819721778599, 141.569324431256 42.9820731463951, 141.569256038598 42.981160535669, 141.569227667357 42.9807015222416, 141.569511846367 42.9806909726391, 141.5699698839 42.9806716084705, 141.570501974586 42.9806035893933, 141.570587292475 42.9805931240864)) ^^http://www.opengis.net/ont/geosparql#wktLiteral