メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.297248964766 43.0724612690368, 141.297502003758 43.0726551627331, 141.296994721046 43.0729334499504, 141.296931732622 43.0729680191054, 141.296263441408 43.0733347021349, 141.295344992941 43.0726042048568, 141.295807490487 43.0723502357473, 141.296733797126 43.071849547185, 141.297186384351 43.0722529254473, 141.297431369926 43.0721119163961, 141.296990583925 43.0717083556154, 141.297114077422 43.0716382818889, 141.297703234354 43.0721927379462, 141.297248964766 43.0724612690368)) ^^http://www.opengis.net/ont/geosparql#wktLiteral