メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.377346222446 43.7666614990804, 142.377634360911 43.7672054348974, 142.377602782792 43.7672143125079, 142.377445200156 43.7672587360908, 142.376633672469 43.767502994168, 142.376177428623 43.7676619971161, 142.375867584343 43.7670929593692, 142.375571851378 43.7665645691855, 142.377063480853 43.7661275767881, 142.377346222446 43.7666614990804)) ^^http://www.opengis.net/ont/geosparql#wktLiteral