メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.865260270502 43.3278851151853, 141.864692703308 43.3279730898814, 141.863642786114 43.3281358140223, 141.863482622639 43.327592061577, 141.863441734016 43.3274358654193, 141.863243454308 43.3267326216837, 141.865923743139 43.326342022963, 141.865927395434 43.3263546946594, 141.86612460789 43.3270370422336, 141.866165156509 43.3272021677439, 141.866182966885 43.327261091186, 141.866320363098 43.3277224805729, 141.865260270502 43.3278851151853)) ^^http://www.opengis.net/ont/geosparql#wktLiteral