メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.223690595413 36.6936111102637, 137.223605393714 36.6935675710893, 137.223378362738 36.6937805136996, 137.223013483669 36.6941227831725, 137.222436518287 36.6939671759184, 137.222575504594 36.6934463948858, 137.222741564548 36.6928976496911, 137.222890027454 36.6923861566092, 137.223910417279 36.6924716379411, 137.224451549603 36.6925169297461, 137.224309583818 36.6930527830433, 137.223980754011 36.6933646955924, 137.223690595413 36.6936111102637)) ^^http://www.opengis.net/ont/geosparql#wktLiteral