NoData values recognised in raster in ArcGIS but not following symbology rules

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المشرف العام

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I have a GeoTIFF raster in ArcGIS, which can be downloaded from the following two links:


  1. http://www.rtwilson.com/downloads/MODIS_MOD04_16-06-2006_Subset.tfw

  2. http://www.rtwilson.com/downloads/MODIS_MOD04_16-06-2006_Subset.tif

If you load these into ArcGIS you will see large uniform areas. Clicking on these areas with the Info tool shows the pixel value to be No Data. However, when you choose to display No Data values as transparent (or as any colour) in the Symbology preferences for the layer, the No Data values do not follow that rule.

Interestingly, the No Data values outside of the main area of the image do follow the rule (set the colour to red to see that), but the ones inside the image don't.

I have really struggled to try and fix this problem - and can't work out how to do it at all. Does anyone have any ideas?



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