メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.390900499066 43.7531795296407, 142.390908682233 43.7533534071685, 142.390923322897 43.753545333171, 142.390957102454 43.7538366169164, 142.390962097771 43.7539497232475, 142.38845796145 43.7540720916794, 142.386517595876 43.7545975268595, 142.386441978743 43.7540009014188, 142.386414618095 43.7535903253477, 142.388360465654 43.753047234592, 142.388347755854 43.7528888506875, 142.390868460664 43.7527731969145, 142.390873718157 43.7528680368496, 142.390900499066 43.7531795296407)) ^^http://www.opengis.net/ont/geosparql#wktLiteral