AnsweredAssumed Answered

Why are my 'NoData' areas displaying in different colours?

Question asked by holly.east1@gmail.com on Jan 16, 2015
Latest reply on Jun 4, 2016 by holly.east1@gmail.com

Hi there,

 

So I masked out an area of an image in Erdas a long time ago and these areas successfully display as 'NoData' (using the Identify tool) and are blacked out.

 

Today I masked out another area of the same image using SetNull so this area too is 'NoData'. However, my two areas of 'NoData' display differently and I was wondering why this is?!

 

When I change the colour of 'NoData' under symbology only one area changes whilst first area remains black.

 

Any ideas would be great.

Thanks!!

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