Vegetation Analysis/Vegetation Index Calculator

Prev Go to previous topic

Go to next topic

Last Post 20 Aug 2007 08:31 PM by anon

1 Replies

Sort:


You are not authorized to post a reply.

Author

Messages

anon

New Member

Posts:

20 Aug 2007 08:31 PM
I am a new ENVI user. I have used the NDVI and Tasseled Cap vegetation indices that are built into the ENVI program on my images and everything worked fine. I want to use a few more, but when I tried using the vegetation index calculator on my images an error message kept coming up. The error message says "wavelengths must be defined to calculate vegetation indices." I am not sure what I am supposed to do to get the vegetation index calculator to work.

MariM

Veteran Member

Posts:2396
Veteran Member

20 Aug 2007 08:31 PM
The VI calculator and Veg analysis tools calculate the indicies and veg products based on the spectral bands contained in the input file. So wavelength information must be defined in the image header in order for the tool to determine which indicies and products can be generated. To define wavelengths in your image header, go to File ->Edit ENVI Header ->Edit Attributes ->Wavelengths.

You are not authorized to post a reply.