メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.475662966865 43.8690707603906, 142.475426585221 43.8692269315787, 142.475232609169 43.8693781232995, 142.474694251804 43.8697293829229, 142.474518651739 43.8698436723099, 142.474190630664 43.8700722049623, 142.473978681436 43.8702144551568, 142.473668709621 43.870422505487, 142.4720593499 43.8691459366637, 142.472374177732 43.868943242504, 142.47289635891 43.8686047927421, 142.47384412324 43.867976664378, 142.474641075818 43.867448442548, 142.475427458477 43.8680844008273, 142.476189732886 43.8687227660206, 142.475662966865 43.8690707603906)) ^^http://www.opengis.net/ont/geosparql#wktLiteral