メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.384585306225 43.7545570238065, 142.384833547921 43.7549793318836, 142.38451757009 43.7550746521414, 142.383493006047 43.7553655566641, 142.383345058662 43.7554075629159, 142.383082877811 43.7549853740493, 142.383153088069 43.7549619455977, 142.382821032399 43.7543744585176, 142.382810359816 43.7543462368703, 142.382710758532 43.7541538104901, 142.384156528318 43.7537421077163, 142.384168675244 43.7537675147076, 142.384186821798 43.7538081222032, 142.384266727338 43.7539706129499, 142.384585306225 43.7545570238065)) ^^http://www.opengis.net/ont/geosparql#wktLiteral