メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.909718319416 43.5128577272504, 141.909711277067 43.5130225510834, 141.909693318441 43.5130628300313, 141.909661682954 43.5131337651799, 141.909587518272 43.5132582683324, 141.90929325934 43.5136778724887, 141.909140149557 43.5138962014703, 141.908893733906 43.5141761392299, 141.908565682433 43.5130378777678, 141.908281467305 43.5120517913086, 141.909414082376 43.5118469715214, 141.90942879455 43.5118722617243, 141.909682559116 43.5126883462306, 141.909718319416 43.5128577272504)) ^^http://www.opengis.net/ont/geosparql#wktLiteral