メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.130895713734 42.9818881433659, 144.129151720319 42.9823065614498, 144.129010596346 42.9823402459693, 144.128986631924 42.9823459840534, 144.128981877342 42.9823471171774, 144.128129241382 42.9825507223595, 144.127714360732 42.9817095746648, 144.12766213695 42.9815799010099, 144.127567057367 42.981527588953, 144.126119689196 42.9808649183355, 144.126906853748 42.9799768351414, 144.128274474337 42.9806192133974, 144.129843444396 42.9813804297786, 144.130570140094 42.9817343400226, 144.130895713734 42.9818881433659)) ^^http://www.opengis.net/ont/geosparql#wktLiteral