メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.352660513282 43.7614899245331, 142.352241177188 43.7616963652318, 142.352029418362 43.7618006130312, 142.351810431274 43.7619124098797, 142.351021555159 43.7622904084885, 142.350571347058 43.7619678965812, 142.35054814233 43.7619512688447, 142.350170287143 43.7616812202438, 142.350768117487 43.7612027876539, 142.350961609468 43.7610597746205, 142.351095435122 43.760960863363, 142.351164509683 43.7609098084962, 142.351459547481 43.7606769573193, 142.351882803567 43.7609571571765, 142.352232148958 43.7612060409674, 142.352660513282 43.7614899245331)) ^^http://www.opengis.net/ont/geosparql#wktLiteral