メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.044498642381 43.5703075102419, 142.044316414811 43.5700854575644, 142.044011874957 43.5699574232628, 142.043154717475 43.5697923702918, 142.043233908073 43.5696130065811, 142.043766356769 43.5697515385611, 142.044273157638 43.5697492655052, 142.044516905623 43.5697101369326, 142.044370962375 43.56917225008, 142.044668203576 43.5691977036919, 142.04523984905 43.5692486016852, 142.045383885312 43.5694927745058, 142.045537314242 43.5697771521661, 142.045277869138 43.5698432237992, 142.044498642381 43.5703075102419)) ^^http://www.opengis.net/ont/geosparql#wktLiteral