For whatever reason, on that server the downsampled images' dimensions, which are successively smaller than the original by a factor of two, are rounded up instead of down as it is usually done (never seen this before). As a result, dezoomify tries to paste an image tile that is too large by one pixel to the output image and fails. I can add an extra check to handle this case in dezoomify to fix this.
Thanks for reporting the bug!
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First I want to say that this program was a great help for me. I use it to download a map from http://www.hochgebirgsforschung.de/Karten/5_Shorong/5_ShorongHinku.html.
Unfortunately the lower part of map is not loaded for some zoom levels, and there is an error message
For above example this occurs with zoomlevel=4. (zoomlevel 5 does not work at all, zoomlevel 6 is excellent).The same effect occurs on other maps.
I am not sure if this is an error in program?
For whatever reason, on that server the downsampled images' dimensions, which are successively smaller than the original by a factor of two, are rounded up instead of down as it is usually done (never seen this before). As a result, dezoomify tries to paste an image tile that is too large by one pixel to the output image and fails. I can add an extra check to handle this case in dezoomify to fix this.
Thanks for reporting the bug!