GeoTiff Black Borders No Data Value option?

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Dwayne Dibbley
Posts: 9
Joined: Sun Oct 25, 2020 11:54 am

GeoTiff Black Borders No Data Value option?

Post by Dwayne Dibbley » Tue Aug 09, 2022 2:10 pm

Currently when importing a skewed geotiff, the area with no data is displayed as black like:
black.png
(558.84 KiB) Not downloaded yet
in qgis for example i can select No Data Value = 0

would this be possible in AQ somehow or would i need to set something else in the geotiffs for it to display transparent when no data?

Psyberia-Support
Site Admin
Posts: 5737
Joined: Wed Apr 14, 2010 9:41 pm

Re: GeoTiff Black Borders No Data Value option?

Post by Psyberia-Support » Wed Aug 10, 2022 11:24 am

Hi,
Right now there is no such option unfortunately.
One solution would be to erase the black color after you've imported the map, as explained here: https://www.alpinequest.net/en/help/v2/ ... from_a_map
Once you've erased the black color, be sure to save your map as a favorite map so the erased color definition is saved.

Otherwise if you can share an example tiff file you've made I can see if I can make the app handle such cases.
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Dwayne Dibbley
Posts: 9
Joined: Sun Oct 25, 2020 11:54 am

Re: GeoTiff Black Borders No Data Value option?

Post by Dwayne Dibbley » Fri Aug 12, 2022 12:49 pm

Sure thing attached a smallish geotiff as an example
florence_modified.zip
(1.73 MiB) Downloaded 43 times

Psyberia-Support
Site Admin
Posts: 5737
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Re: GeoTiff Black Borders No Data Value option?

Post by Psyberia-Support » Mon Aug 15, 2022 12:22 pm

Thanks for the file.
Next update will handle the nodata value correctly (you'll need to re-import your tiff files).
Until then you can use the workaround described above that will produce a similar result.
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