メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.066297991289 42.9220799654717, 143.065383250822 42.9220102421715, 143.065131712355 42.921992340006, 143.064379492333 42.9219388949256, 143.064500703556 42.9211368087081, 143.064562578096 42.9207268241971, 143.066076659325 42.920826817424, 143.066136119634 42.9209816870748, 143.066205588275 42.9212566833432, 143.066207081356 42.9212682769439, 143.066263668758 42.921712865226, 143.066297991289 42.9220799654717)) ^^http://www.opengis.net/ont/geosparql#wktLiteral