メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.389981685823 34.7616781249582, 137.389563322287 34.7617166216066, 137.38868336893 34.7617860821863, 137.387958720312 34.7618493449844, 137.388051484495 34.7611289939162, 137.388116885917 34.7606210980052, 137.388831072781 34.7606932172947, 137.389291382114 34.7607442333993, 137.389381976464 34.7607546364088, 137.389925519044 34.7608000080721, 137.389941942797 34.760997314281, 137.389981685823 34.7616781249582)) ^^http://www.opengis.net/ont/geosparql#wktLiteral