Sunday, March 07, 2010

How to Open AVIRIS Image in ENVI

How would you open a hyperspectral AVIRIS Image in an ENVI environment? If you are new to using AVIRIS data, you may have problems importing them to ENVI. ENVI software support hyperspectral datasets and it is quite easy to open them.

A downloaded Airborne Visible InfraRed Imaging Spectrometer (AVIRIS) image from the AVIRIS website will have these extensions: .eng, .nav, .rfl.

To open the image: Open Image File --> (Select the First Scene File -- the first .rfl file)

Then you will be prompted with a window that will ask for the data format, like defining the header file. The downloaded data usually carries a "readme" file that should contain all the information necessary to define the header file.

For AVIRIS, the typical input is:

samples = 614
lines = 512
bands = 224
header offset = 0
file type = ENVI Standard
data type = 2
interleave = bip
sensor type = Unknown
byte order = 1

Try these parameters and you will be able to open the images with no problem.


Post a Comment