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

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ENVI 5.2.1 How to do an Accuracy Assessment using test data from a shapefile

ENVI 5.2.1. From a .tiff image (4 bands) I created a Supervised Classification Maximum Likelihood .dat file. Now I want to perform an Accuracy Assessment using test data from a shapefile. I've tried ...
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13 views

georeferencing envi data with lat/lon in arcmap

I need to georeference gridded ENVI files or rather add georeferencing to the metadata. I do have the lat/lon of the corner points of the data and the spatial resolution. Any suggestions of how to put ...
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1answer
25 views

Is there anyway to analyze the MODIS MCD12Q1 level 3 data in ENVI?

How can i see the classes of the product MODIS MCD12Q1 and analyze them in ENVI exelis? Seadas open them but ENVI not.
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6 views

Georeferencing of ROI in ENVI?

I had an image which is not georeferenced for my study area. I have processed the data and made roi files in envi 4.7. Now I have georeferenced the image data. I have a doubt that whether the roi ...
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35 views

Emissivity for Landsat 7 and landsat 8 in ENVI software

How to calculate different types of emissivity in ENVI software using Landsat7 and 8?
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ENVI 4.7 editing overlapping individual classified layer

Does anybody knows how to erase/ eliminate an overlapping individual classification output in ENVI? Thank you
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20 views

How to convert an endmember collection spectral signature file from OLI sensor to TM and ETM+ sensors

I'm working on some supervised classifications using scenes from the landsat legacy archive wich include ETM+, TM 5 and OLI data from 2001 to 2014. I have training and validation points for each scene ...
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1answer
87 views

How to call Exelis ENVI tools with python and ArcGIS?

I am writing a script for geopocessing landsat data using ArcGIS 10.3. But ArcGIS doesn't have tools for landsat calibration (converting from DN to reflectance) and ENVI have this tool called ...
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83 views

EVI and NDVI range value

I've used a Landsat 8 image for vegetation analysis in an urban area. I've got a large maximum number of EVI value as shown in this image: Is this normal in calculating EVI and NDVI? Because I know ...
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45 views

mosaicking and projecting modis land cover data MCD12Q1

I have modis land cover MCD12Q1 data .Its in the sinusoidal projection (.hdf native format ). I have to study the land cover characters from the data for which i have to convert them into .tif format ...
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59 views

DEM data processing

I downloaded ASTER GDEM Tiles and mosacked them in ENVI. After that I exported the Mosaic in tiff format and I opening it in Arcgis, the image is gray all through but the pixels are showing correctly. ...
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13 views

denoising modis data using envi

I have remove the noises in MODIS ndvi and evi raw data to subject them into regional lulc classification. I am using envi 5.0 . Which module in it will do the job by automated process . I dont ...
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19 views

lulc unsupervised classification in envi for modis 250m data

I've got modis 250m data with NDVI,RED,BLUE,NIR,MIR bands....i have to obtain 10 classes such as Urban,Evergreen,decidious,cropland,fallowland,plantaion,water,barrenland,land with scrub,land without ...
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294 views

how i calculate land surface temperature using landsat 8 in Envi 5.1

I am doing research about land surface temperature using Landsat 8 image. However, I have a problem with them. I have read document from Landsat.org, but i can not do it in Envi. Could you help me ...
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30 views

Need to develop a model for measuring inter-annual and seasonal variability in pasture cover using modis 16 day composites

Aiming to use statistical methods in ArcGis and Envi image analysis to measure inter-annual and seasonal variability in paster cover using MODIS 16 day composite image from 2000-2014. Quite stuck on ...
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28 views

Suppress values from multiband rasters

I have a raster stack with 84 bands . It is a time series raster. It so appears that the cloud is causing error in my processing and hence i need to suppress or replace them by a NaN to eliminate them ...
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67 views

How to destripe the thermal band in SLC_off LandSat 7 ETM+ data?

I am working on a special study in one of my subject. My study would require me to extract land surface temperature each year for 2007-2014. Since LandSat 5 ceaseed to operate last 2011, my 2012-2014 ...
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87 views

set cells with specific values as NoData in afloating raster

I have a raster file which includes floating values. I need to set cells with specific values as Nodata. For Raster integer values, the setnull tool can be applied, is it any tool for floating point? ...
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123 views

Spectral mixture analysis from GeoTIFF in ENVI

I have a single GeoTIFF created from some NGB aerial photography that has been stitched in Agisoft Photoscan to create a single image of an area of heath. I would like to perform spectral mixture ...
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15 views

Data conversion from IDRISI to ENVI

I have signature data generated with idrisi selva programme(rgf format). How is transfer signature data to ENVI? I want to classification by this signature data in ENVI. Could you answer, please
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1answer
48 views

ENVI 5.1 Help with clipping irregular shapes

Does anyone know how to clip files using an irregular shapefile so that I don´t get the rectangle geometry in the end? Thanks so much!!
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49 views

ENVI: Postclassification, remove pixels of certain size

I did a classification over multiple Landsat imagery in ENVI 5.1, which turned out not too bad (ice and snow in Cyan in the picture below). Now I am about to do a postclassification to filter out ...
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60 views

atmospheric correction in ENVI 5.1

I want to perform atmospheric correction on Landsat 8 images in ENVI 5.1. In order to create radiance image, I selected basic tools> preprocessing> calibration utilities> Landsat calibration. However, ...
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87 views

ENVI 5: High resolution export of multiband imagery

I have to export some multiband Landsat imagery (Landsat channel combination 543) in high resolution in ENVI 5 for a Figure which I later will edit in Adobe Photoshop and Illustrator, best would be ...
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19 views

Runnig of LSMA method in ENVI sotware

I am going to run LSMA method. However, I have some problems. First, how could I identify a correct threshold value from the PPI image? Second, how could I find correct places to draw ROIs ...
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104 views

Asking linear regression between NDVI and LST using ENVI

Here I have a problem to calculate a linear regression. I Have two images of NDVI and LST derived from Landsat 8 and want to calculate the linear regression for between them obtaining the dry edge and ...
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78 views

creating multi band raster from one GeoTiff

I'm using AgiSoft photoscan to create a photo mosaic from aerial images. The images are being captured using a camera modified for NIR and RGB data capture. I want to be able to perform spectral ...
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132 views

Resample Landsat 8 to 60m Resolution

I have two Landsat images for the same study area. One of them in 1975 (Landsat 2 MSS with 60m resolution) and the other in 2014 (Landsat8 OLI with 30m resolution). I want to do change detection ...
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1answer
155 views

Pro vs Con on using export to JPEG or JP2000 files for large imagery files

What is the preference among GIS Specialist and Remote Sensing Specialist using the JPEG vs JP2000. Yes, I am aware of other compressed files such as ECW or MrSID... I am more of concern of how to ...
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80 views

How do I open MOD17A3 in ENVI such that it is properly georeferenced?

I am using ENVI 5.1 on Windows 8. I am trying to open a MOD17A3 (MODIS Net Primary Productivity standard product - L4) .hdf file which I downloaded from the USGS website. I am still a beginner at ...
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16 views

Working with Aura's OMI Data in Envi

I have downloaded Aura's OMI data from h++p://mirador.gsfc.nasa.gov website but I can not work with them..How can I open these data in envi and what preprocesses are needed for these images? Thank ...
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37 views

Pyramid Creation Utility for ArcGIS 10.1 or later

Someone wrote a really neat ENVI Pymramid Creation Utility I am wondering if there is similiar one for ArcGIS
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116 views

Analyzing stacked time series NDVI images in ENVI

I just started playing around with stacking NDVI images from different years into one RGB value and am unsure how to read the photos or analyze them. The image on the left had R 2011 G 2011 and B ...
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54 views

What is the Pro or Cons for mosaic 30 GB jp2000?

Has anyone tried mosaic jp2000 imagery in ERDAS, ArcGIS , ENVI or any softwares that they have accomplished ? I have three jp2000 files that is total about 28.1 GB that I want to mosaic with ?
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2answers
28 views

How to load two images in ENVI 5.1?

I am using ENVI 5.1 and when I use the Data Manager to load several images and if I want to load two adjacent images, why would one of them load and the other doesn't?. Am I missing something here ?
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28 views

How to write a UNIX ANSI text file under windows by IDL

I want to use openw in IDL to write a UNIX ANSI text file under windows. But the result are always in the format of PC UTF-8. Does some one know how to solve this issue? Thanks!
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103 views

How to load an ENVI file into ArcGIS?

I received a series of *.img files with a single .hdr file that contains the necessary georeferencing information (i.e., samples, lines, coord system, etc.). I presume this is an ENVI header file ...
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81 views

opening a georefrenced image in IDL in ENVI

I am working with idl in envi,I want to use ENVI_CONVERT_FILE_COORDINATES in case of finding pixel value of specified point,for this porpuse I have lat and long data of my point but I need to open ...
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2answers
155 views

Using MODIS Data after FLAASH

I am working on my thesis and I need to convert modis MOD021km data to reflectance and Brightness temperature.I know that some plugins for Envi is doing this with modis data but I want to run an ...
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93 views

Pixel Value in a Lat and Long location in Envi IDL

I am new with ENVI IDL,I want to get pixel value of each band in an image in specified lat and long location.I can do a loop among bands in image using this code ...
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1answer
93 views

Does MOD021km images from MODIS needs atmospheric corrections

I have downloaded some mod021km modis images and I want to work with them.I want to know does these data needs atmospheric corrections?sth like FLASSH in ENVI or other methods?I can convert hdf files ...
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89 views

Retrieving Aerosol Optical Depth (AOT) from Landsat multispectral data

I need to retrieve Aerosol Optical Depth from Landsat multispectral datasets. Has anyone successfully tried something like that before?
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1answer
201 views

Could not open/read USGS raster file

I could not open/read the following .img file. The document below says it is a raster file. http://edc2.usgs.gov/1KM/land_sea_mask.php I tried to open it using many ways such as Q-Gis software, and ...
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71 views

Georeferencing SpecTIR Free Data Sample from IGM and/or GLT files

I have recently downloaded some data from the official SpecTIR website for some personal research interests. The website says that the ZIP file contains information about how to geo-reference the ...
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174 views

Opening an modis hdf file in Envi and Calibration

I have downloaded an modis hdf file.it is l1 and its name is MOD021KM ..I want to convert it to radiance.so I performed this steps in envi Open>EOS>MODIS selected modis hdf file.then I tried to run ...
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1answer
124 views

ALOS PALSAR 1.0 level JAXA Orthorectified K & C Mosaic interferometry?

JAXA is providing free access to PALSAR 50m Orthorectified K & C Mosaic. The files are not in the typical PALSAR format. I'm looking for apps that can read and export this data. It's possible to ...
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84 views

PALSAR 50m Orthorectified K & C Mosaic it's possible to create interferometry?

JAXA is providing free access to PALSAR 50m Orthorectified K & C Mosaic. According to the website, data are provided in raw (HDR) and png. ALOS PALSAR K&C Mosaic or New global 50m-resolution ...
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30 views

How to overlay Radiance (Top-of Atmospheric radiance) over Digital Numbers Image?

I am trying to process INSAT-3D images, which contain six different bands. I have to extract each and every band form the .h5 data file, so when I extract first band (MIR) band form the data set, I ...
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236 views

QUAC atmospheric correction for Landsat-8 (ENVI 5.0)

I try to realize QUAC atmospheric correction for the band 4 and band 5 of Landsat-8 in ENVI5.0. This version doesn’t support Landsat8 (doesn’t have parameters of Landsat-8). At the first step I glued ...
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329 views

Landsat 8 to the temperature map (in ArcGIS 10.0 -10.2.2 or ENVI 5.0) [closed]

I need to create a temperature map from Landsat 8. I found an algorithm that explains how to do it in ArcGIS: ...