メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.334678848614 43.7651212076177, 142.335269346561 43.7652926088743, 142.336277099632 43.7656172331726, 142.336946682317 43.7658254667779, 142.336898580812 43.7670387375812, 142.336896109057 43.767141689685, 142.334592171509 43.7663852798315, 142.334374369794 43.7663137676659, 142.334012873356 43.7661950905213, 142.333321278597 43.7659680063218, 142.33395377298 43.7648987270752, 142.334018046112 43.7649184572202, 142.334678848614 43.7651212076177)) ^^http://www.opengis.net/ont/geosparql#wktLiteral