メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.462465924289 43.4528880884268, 142.462122084744 43.4524921556165, 142.462357714724 43.4520305221988, 142.46265358787 43.4514079049762, 142.462982045744 43.4507540370177, 142.4632628209 43.4501442102771, 142.46357119053 43.4495050755657, 142.463747244674 43.4487919225172, 142.463785680455 43.4482787879954, 142.464330594115 43.4480414026983, 142.464577811522 43.4482498078848, 142.465567813492 43.4494023864211, 142.466802636103 43.4507798535736, 142.466845281958 43.4508276657313, 142.462465924289 43.4528880884268)) ^^http://www.opengis.net/ont/geosparql#wktLiteral