メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.33416059857 43.7484621686847, 142.33478852623 43.7486531086009, 142.334320346113 43.7493905669563, 142.333863620125 43.7501343610991, 142.333278602817 43.7499585992046, 142.333285406449 43.7499472025028, 142.33254915948 43.7497221063924, 142.333003721498 43.748986309329, 142.333427433464 43.7482345715897, 142.33416059857 43.7484621686847)) ^^http://www.opengis.net/ont/geosparql#wktLiteral