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Questions tagged [envi]

A remote sensing and image analysis software package produced by Exelis Visual Information Solutions (Exelis VIS).

ENVI (an acronym for "ENvironment for Visualizing Images") is a software application used to process and analyze geospatial imagery. It is commonly used by remote sensing professionals and image analysts.

ENVI bundles together a number of scientific algorithms for image processing a lot of which are contained in automated, wizard-based approach that walks users through complex tasks. It was originally developed by Better Solutions Consulting, LLC, a partnership of five individuals in Boulder, CO. In 2000, ENVI was sold to Kodak at the same time Kodak purchased RSI.

Source: Wikipedia.

Also see the Exelis VIS ENVI page.

294 questions
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ENVI to map composition

I'd like to print out 6 images in a single page. How can I do this using map composition tools in ENVI (6 images are year-to-year dynamic images with the same size and the same geo-referencing)?
user3063
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Enhance Vegetation Index ( EVI ) equation in ENVI IDL

I'm using ENVI 5.3 to find EVI, when I'm applying the equation it doesn't run, anybody can provide me the exact equation or formula for running the index. For more clarification, I'm using Landsat 8 OLI.
Rebar
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Is it possible to convert the SPECPR spectra files in to envi readable format?

The SPECPR files available with USGS spectra files are readable using the plugins which are tested with envi. specially envi 4.5 and 4.8. how ever is it possible to convert the full spectrum of specpr file in to a spectral library format in envi?…
kalani lakshani
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ENVI Vegetation Index Calculator

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…
Aaron
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How to open FGDB raster in ENVI?

I have File GeoDatabase raster image that is combined with multi-bands and I want to do classification (ISO unsupervised) in ENVI. How can I open a FGDB raster in ENVI?
phonepyaitun
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ENVI Example Based FX segment selection slow

I am using the Example Based FX workflow in ENVI 5.5 and the segment selection tool is extremely slow. It used to be fairly fast but now takes a long time (30 seconds or more) to process one small segment even one as small as a 10m pixel. Does…
nmichelg
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Exporting region of interest (ROI) from scatter plot in ENVI

I have a scatter plot of LST (y-axis) amd NDVI (x-axis) on ENVI 5.3. I selected some points from the distribution as a region of interest. When I export the ROI, I found only the value of Y. However, I need to get both the value of X and Y for…
Solomon H.
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Display Failure of image in ENVI

Fig.1 is the image in zoom of 15.5% ,and Fig.2 is fixed zoom in 59.0%. Obviously,Fig.1 window fails to display.However,the image can display regularly after zooming into a certain percentage. What is the reason for display failure of Fig.1? …
Falcon_Baikal
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How to import a multiband image into IDL?

I want to run mathematical calculation on monthly NDVI images from april to october. I stacked monthly NDVI images through april to october into an image (with 7 band) using ENVI. Now I wanna import this image into IDL. How can I do this? What kind…
Lusa
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Parameter names and meaning of their values in an ENVI header file

This is the header of an Envi file: ENVI description = { PolSARpro File Imported to ENVI} samples = 8407 lines = 5569 bands = 1 header offset = 0 file type = ENVI Standard data type = 4 interleave = bsq sensor type = UAVSAR byte order = 0 map…
Sepideh Abadpour
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MOD13Q1 data (2008-2012)

i ordered MOD13Q1 images (2008 -2012) from NASA and there came in hdf format, now i want to extract only NDVI images but the hdf made up of all vegetation indices data.Please how can i solve this?
user55476
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Working with Aura's OMI data in ENVI

I have downloaded Aura's Ozone Monitoring Instrument (OMI) data from http://mirador.gsfc.nasa.gov website but I can not work with them. How can I open these data in ENVI and what pre-processes are needed for these images?
Majid Hojati
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ENVI5.0. Is it possible to use "Quickmap" option? How to create a simple map?

I used to work in ENVI 4.8, but now have to move on ENVI5.0 I found it was changed a lot comparably with the previous versions, obtained many good new options, but some old options, in ENVI4.8, are disappeared or so significantly changed, that…
user31077
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ENVI error class_doit: An error has occurred during processing Error: "LA_LUDC: Singular matrix encountered, STATUS=2." The result may be invalid

I do a Maximum Likelihood Classification in ENVI 5.3. But after the process read the ROI, then appear pop up "ENVI error class_doit: An error has occurred during processing Error: "LA_LUDC: Singular matrix encountered, STATUS=2." The result may be…
Fahmi Adnizar Sobarman
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Rescaling MNDWI to normalize

This statistic report shows the scale after done the MNDWI index process by using software ENVI 5.1. Normally expect result have to be -1 to +1 scale. How to get which scale?
suje harish
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