メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.394996312824 43.7531438453254, 142.395065579081 43.7536292947898, 142.393018431026 43.7537278231753, 142.390957102454 43.7538366169164, 142.390923322897 43.753545333171, 142.390908682233 43.7533534071685, 142.390900499066 43.7531795296407, 142.390873718157 43.7528680368496, 142.392921822728 43.7527487833483, 142.394954855237 43.7526440858488, 142.394955354539 43.7526502906396, 142.394996312824 43.7531438453254)) ^^http://www.opengis.net/ont/geosparql#wktLiteral