メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.936939430638 42.9384054625692, 142.936447750027 42.9386985948382, 142.936369440092 42.9387452712619, 142.936367363085 42.9387433841968, 142.9351596326 42.9376512640514, 142.935256475888 42.9375927322319, 142.935741451823 42.937299646057, 142.936262416593 42.9377939800858, 142.936891615321 42.9383622847237, 142.936939430638 42.9384054625692)) ^^http://www.opengis.net/ont/geosparql#wktLiteral