メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.338795213886 44.4824393237147, 142.338655999325 44.4827343947599, 142.338540420608 44.4829747074164, 142.338451999864 44.4829484432506, 142.335761085456 44.4822916522531, 142.335911980124 44.4819453889587, 142.33599974764 44.4817703157096, 142.337179086721 44.4820600652267, 142.338710240485 44.4824193858956, 142.338795213886 44.4824393237147)) ^^http://www.opengis.net/ont/geosparql#wktLiteral