メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.774048658067 35.4051888315748, 136.774116125638 35.4061052920542, 136.773980911432 35.4062300622504, 136.773794901465 35.4060892530028, 136.773563121443 35.4059332962209, 136.772827758497 35.4055077546148, 136.771980998106 35.4050243845704, 136.772565341747 35.4050462823488, 136.772804026803 35.405037057151, 136.774040879521 35.4049033924723, 136.774048658067 35.4051888315748)) ^^http://www.opengis.net/ont/geosparql#wktLiteral