メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.396078231803 43.7635637840576, 142.396130613779 43.7640541434498, 142.396188662365 43.7645403991586, 142.394539788266 43.7646331380552, 142.392869954791 43.7647218528069, 142.392848538939 43.764723233082, 142.392146065947 43.7647679978691, 142.392080386455 43.7640165130647, 142.392011744344 43.7632844761928, 142.392716775067 43.7632465120089, 142.394371252408 43.7631689293876, 142.396035044228 43.7630828543488, 142.396078231803 43.7635637840576)) ^^http://www.opengis.net/ont/geosparql#wktLiteral