I am attempting to input 4-band CIR imagery into ENVI's Vegetation Index Calculator and keep running into the same error: "Wavelengths must be defined to calculate vegetation indices".
I have attempted the following troubleshooting based on this thread with no success:
File > Edit ENVI Header > Edit Attributes > Wavelengths... > Wavelength/FWHM Units: Wavenumber
Unfortunately ENVI's help section does not provide good support for this problem. Any advice on how to correctly input these images would be greatly appreciated.
Edit: An example of the 2010 NAIP 1M NC/CIR DOQQ input imagery can be found here. Please note that I converted the base DOQQs from .jp2 to 8 bit unsigned geoTIFFs.