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For some reason I have been given 30tb of imagery directories in {dataset_name}/{z}/{x}/{y}.png format, zoom levels from 4 to 20. Some of those datasets have the {y} file name value "inverted", where the tile grid begins at the bottom left rather than top left. I can load those datasets in QGIS by specifying {-y}.png in the URL's control string. Is there any slick way I could use the Web Server --> ImageServer (Custom) facilities in 9 to do something similar? Would love to not have to rename all the tile files (y = (2^z) - y - 1), but in the end, it might make sense to do so. Thank you.
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