Grayscale ECW opacity layer not correctly displayed

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01-10-2022 06:13 PM
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RichardNicholls
New Contributor II

A problem we've had for ages is whenever we load a Grayscale ECW into ArcGIS with an opacity layer, the default is for it to load as a colour and use the opacity as the green/blue values and the grey as the red (see attached). Is there some way for Arc to default as greyscale correctly?

If I generate a mosaics without opacity, it loads correctly, but opacity is needed to remove the null areas.

We're using ArcGIS Desktop 10.6.1

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evemarwernick
New Contributor II

Hi, 

If you haven't solved it yet, I think you can get the results you want by changing the RGB Composite values:

Red: Grayscale
Green: Grayscale
Blue: Grayscale
Alpha AllOpacity

 

evemarwernick_0-1713231745788.png

Regards,

Evemar Wernick

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