メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.908004179197 43.4879750947594, 141.907140681418 43.4881145470709, 141.906891351538 43.4876113544871, 141.906852792794 43.4875173192061, 141.906515117256 43.4863474485194, 141.907506572582 43.4861892883302, 141.907541846626 43.4863134489596, 141.907798429476 43.4872369333317, 141.90798618091 43.4879126623143, 141.908004179197 43.4879750947594)) ^^http://www.opengis.net/ont/geosparql#wktLiteral