メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.389701172361 44.1805652267731, 142.389329581405 44.1805194261719, 142.389522813993 44.179900846846, 142.389575249027 44.1797012619684, 142.389621317263 44.179494070378, 142.389663171906 44.1792990849593, 142.38970727949 44.1791512971917, 142.389736483108 44.1789715325572, 142.390163658995 44.1790426293801, 142.389701172361 44.1805652267731)) ^^http://www.opengis.net/ont/geosparql#wktLiteral