メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.414458789473 43.7891303441753, 142.414811053995 43.7893349722166, 142.41516183551 43.7895514495258, 142.4155022225 43.789773356604, 142.415693297205 43.7898918214826, 142.41615609612 43.7901831861585, 142.416168483937 43.7901911677256, 142.414860233456 43.7913120559925, 142.414375184164 43.7910138777918, 142.414188014781 43.7908817980791, 142.413842693235 43.7906580137968, 142.413485015346 43.7904357220805, 142.413159426275 43.7902331100742, 142.412770053645 43.7899913289818, 142.414085624698 43.7888998499581, 142.414458789473 43.7891303441753)) ^^http://www.opengis.net/ont/geosparql#wktLiteral