[Geotiff] How to transparent the background Geotiff image

[Norsidah Taib]

Hi there,
I would like to ask about how to make the background image appear as transparent without changes
the value of the image (coordinate).My image is the geotiff raster image(the image with the
coordinate). I get that image using ERDAS Imagine which is *.img file, then i import to *.geotiff.
I have set the background as transparent but when it displayed,the background color is white. Can
I do the transparent function as in adobe photoshop?,because i afraid that the image's coordinate
would loss.Is there any program that can do the transparency function on geotiff image like
photoshop?

Currently, I develop a program that display the geotiff image. I use visual basic and map
object(from esri).
Thank you for spending your time read my email.Hope to hear from you soon. Thank you so much.

Regards,
Norsidah Taib,
Malaysia.


=====
Norsidah Taib,
Faculty of Geoinformation Science & Engineering 
Universiti Teknologi Malaysia 
81310 Skudai, Johor, Malaysia 
Tel:+07-5530969,Fax :+07-556163


		
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