Questions tagged [envi]

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

Filter by
Sorted by
Tagged with
0
votes
0answers
7 views

Opened image appears corrupted

I have a hyperspectral image that I am fusing with a multispectral image (of the same scene) on Matlab. I also have a reference image of the final result in order to be able to compare and evaluate ...
3
votes
1answer
341 views

Error reading envi file from zip using /vsizip and gdal in python

I am having an issue reading an ENVI binary file (with .hdr file) from a zip file using GDAL in Python and the /vsizip driver. I know the ENVI file (binary and header) itself is fine, since when I ...
0
votes
2answers
3k 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? ...
4
votes
1answer
335 views

Identifying pixels with sun glint in a satellite image (for atmospheric correction)

Wondering if anyone knows a way (perhaps objective) to identify pixels that are infected with sun glint in an image. I'm using Hedley's 2005 approach in a python to deglint my image but this approach ...
1
vote
1answer
94 views

Exporting landcover clasiffication from ENVI to SAGA

I have basic knowledge in remote sensing and GIS. I have generated landcover map in ENVI 4.7. How can I transfer or Export/Import this into SAGA so that I perform other functions in SAGA. I want to ...
0
votes
1answer
102 views

Matching extent (samples & lines) to get multi-temporal stack

I downloaded several Landsat scenes (4x3) to create some multi-temporal stacks to see the phenological difference in April/March - mid summer - autumn. I actually use The EnMap Box which has been ...
7
votes
1answer
366 views

Opening MOD17A3 in ENVI so 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 ENVI,...
0
votes
1answer
718 views

ENVI Error running FLAASH Atmosphere Correction

I've made a Radiometric calibration on a Landsat-8 image. Next, I've tried to make a FLAASH Atmosphere Correction from the Toolbox but I get a warning message and the process stops with errors. The ...
1
vote
1answer
78 views

GeoTIFF to ENVI GDAL translation causes rotation

I have a GeoTIFF(you can download it here ~16MB) which I want to convert to ENVI raw. I'm using this GDAL command: gdal_translate -ot UInt16 -scale -of ENVI -outsize 1025 1025 dgm1_32372_5680_2_nw.tif ...
2
votes
2answers
2k views

ENVI band math incorrect values

I'm attempting to calculate vegetation indices in ENVI 5.2 using level-2 AVIRIS data in band math. The indices I'm working with are Vogelmann Red Edge 2, normalized difference red edge, and red edge ...
0
votes
1answer
75 views

Mosaicing of multitemporal Sentinel-2 images

My aim is to combine several Sentinel-2 Level2A images of the same location/orbit number but at different dates of a year. I would like to have different options to create that mosaicing (e.g., if ...
0
votes
1answer
454 views

Make layer stacking in ENVI for Landsat 8

I downloaded Landsat image 8 and I made layer stacking for RGB layers in ENVI (Bands 4,3,2) to classify the land cover types. But the problem appeared when I conducted supervised classification. I ...
6
votes
5answers
7k views

Fixing Landsat 7 SLC-off in ENVI

I have a couple of Landsat 7 images and they all have striping as a result of the SLC failure. Does anyone have any suggestions as to how to destripe the image using ENVI? I plan to use these images ...
0
votes
0answers
13 views

Viewing components of complex ENVI .hdr Labelled Raster

An output of my InSAR analysis is an ENVI .hdr complex raster with data type 6. The data is stored as a real-imaginary pair of single-precision floats. QGIS can load the raster, but displays nan for ...
0
votes
1answer
33 views

ENVI fmask Error for Landsat 5 data

I'm trying to mask cloud cover of multi-spectral Landsat 5 image containing bands 1-7 that have been preprocessed using dark object subtraction and Landsat calibration. I am using the fmask tool in ...
0
votes
0answers
16 views

Reproject soil moisture product L3 from SMOS (SM_RE04_MIR_CLF33A) from Ease Grid 2 to other map projections

I need to re project soil moisture product L3 (SM_RE04_MIR_CLF33A) (NC file) from Ease Grid 2 to other map projections. Is there any way to do that? What software can I use?
0
votes
1answer
84 views

Specifying band combinations when loading LANDSAT MTL files in ENVI IDL?

I'm somewhat new using ENVI and have a very limited background in programming. I was asked to compile 12 RGB and NIR composites of LANDSAT scenes within a specific timeframe and would like to use ENVI'...
1
vote
1answer
640 views

Is there a Post-classification Majority Analysis feature on Google Earth Engine (Similar to ENVI)?

In ENVI there's a Majority/Minority Analysis function that allows you to to change spurious/"wrongly classified" pixels within a large single class to that class (it also allows you to enter kernel ...
0
votes
1answer
263 views

ENVI 5.1 - ANN Classification - Background was classified into one of the class

I'm new to Remote Sensing and I'm having trouble in ENVI 5.1 where the background was classified as one of the classes in the ROI I used, which is not right. How can I exclude the background or at ...
2
votes
1answer
232 views

Planet filter file for ENVI atmospheric correction

I have 4 band Planet Scope multispectral imagery that I am trying to process in ENVI. It is the analytic data, so it is already radiometrically corrected. I have converted the .tif to a BIL, and ...
0
votes
1answer
51 views

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?
0
votes
0answers
7 views

How do I generate an output filename in envi modeler based on the input filename?

I am doing time series analysis using Sentinel 2 data to look at NDVI change over time. The sentinel images include the date within the filename structure and I would like to pull this through to be ...
0
votes
0answers
12 views

Raster color data losing in ENVI

everyone. I have saved vector data as geotiff raster in Mapinfo software. And there are no problems opening it in Mapinfo or Global Mapper, but when opening in ENVI some colors are losed and others ...
0
votes
0answers
13 views

ENVI batch processing thermal images to degrees celsius

I have a folder called SET1 that contains .tif thermal images from a Micasense Altum. In ENVI, I would like to: Batch process all the images in the folder to calibrate the pixel values to degrees ...
1
vote
0answers
29 views

Cloud Shadow interferring with NDWI Analysis

I'm working on surface water identification in Northern Kenya. I'm using Landsat 5TM and Landsat 8OLI data in ENVI 5. I've masked clouds using the QA band (although have also tried the fmask tool- ...
5
votes
2answers
322 views

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)?
3
votes
1answer
182 views

MODIS L1B reprojection and mosaic problem

I have been using MODIS L1B file to retrieve water vapor content. However, my study area is exactly between the gap between two images,just like this: I have tries ENVI MCTK extensions, HEG TOOLS, ...
-1
votes
1answer
52 views

Finding sericite alteration in ENVI 5.3 spectral library?

I work on an area where there is a sericite alteration and i searched for the sericet and did not find a word. I want to know what is called sericet in the spectral library of ENVI 5.3? Sericite is ...
4
votes
1answer
379 views

Why getting wrong NDVI values resulted from scaled reflectance in ArcMap?

I have made atmospheric corrections to my Landsat 8-OLI raster using 'ENVI FLAASH' having surface reflectance values scaled between 1-100. In ArcGIS I am using simple expression to compute NDVI ...
3
votes
1answer
453 views

Creating 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. Is it possible ...
2
votes
3answers
7k views

NetCDF to Geotiff file conversion

How would I convert NetCDF files to Geotiff format? The data I am using is air temperature data that comes from the Climatic Research Institute and I want to display it on ENVI. I am not familiar with ...
0
votes
0answers
13 views

How do I mosiac region miles and miles apart from each other in ENVI?

The 3 region I want to mosaic together? I am running a classfier in ENVI. The survey data available is of only one of these three regions!
0
votes
0answers
30 views

FLAASH produces weird peaks

I am applying FLAASH to atmospherically correct and convert to reflectance a hyperspectral image acquired by our airborne system. The problem is that FLAASH (using ENVI) outputs an image where all ...
1
vote
1answer
110 views

Merging 7 Satellite Images into 1 Image

I want to join 7 images [that is in .tiff] and merge and than subset the area using shapefile. But i am not able to merge it. I have loaded the images as raster layer and than merge it Using Qgis and ...
0
votes
0answers
26 views

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?
5
votes
2answers
970 views

Applying pixel reliability mask to time series MOD13Q1

I am working with a 23-band GEOTiff in which each band is a 16-day MVC MODIS NDVI image. The MODIS .hdfs include a "pixel reliability" image with the following values: [-1]: Fill/No Data-Not ...
1
vote
1answer
2k views

Raster vs. Raster Scatter Plot in ArcGIS

I created two raster datasets from the same world view 2 image. One dataset is NDVI, the other is a normalized surface water index (NDSWI). I would like to create a scatter plot for a pixel by pixel ...
0
votes
0answers
13 views

Outputting SAGA-classified grid into form that can be opened in ENVI with information of each classes

I'm new in SAGA and classification. I used the tool called "Local climate zone classification" in SAGA and I want to open it in ENVI to do the validation and stats analysis. What I output is a .tif ...
0
votes
0answers
22 views

Calculate mean of a column in ENVI

I have raster that looks like this: I want to create from this raster new raster that will have only one row, when each pixel of this new row is mean value of the column. I know how to do this in ...
0
votes
0answers
90 views

Creating scatter plot between to images in QGIS,ENVI or GEE

I have two images , for each one I have created new calculated band. Now I want to create scatter plot and to create statistic for the correlation between the values of those two bands for those ...
0
votes
0answers
53 views

Using point shapefile as training data for example based classification in ENVI

I am trying to undertake a supervised object based classification of vegetation types on a sentinel 2 image. I am having trouble using a point shapefile as training data in the ENVI example based ...
1
vote
0answers
26 views

Enhance Vegetation Index ( EVI ) equation in ENVI IDL [closed]

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 ...
1
vote
0answers
25 views

Map info extraction ENVI header

Does anyone have any idea about getting the map info from an ENVI header file? This is my file.hdr as shown in the text editor: ENVI description = { C:\xxxx\yyyy\Desktop\filename.} samples = 36000 ...
0
votes
0answers
23 views

Add ENVI sensor type?

Can you add a sensor type to ENVI? I wonder if the ENVI sensor type characteristics are stored in an xml file or something in a standard location, and I can add the characteristics for a custom ...
1
vote
0answers
33 views

GEMI vegetation index calculation in ENVI

I want to calculate gemi index, but I can't write its formula in ENVI, this doesn't work. gemi formula is: (n(1−0.25n)−RED−0.1251−RED) n = ( 2 * ( NIR ^2 - RED ^2) + 1.5 * NIR + 0.5 * RED ) / ( NIR ...
1
vote
0answers
37 views

Co-registering multiple temporal orthomosaics?

I have multiple (19) orthomosaics of the same approximate region taken regularly over the course of a couple months with a UAV. Some, but not all, include ground control points we placed in the scene....
-1
votes
1answer
711 views

Analyzing stacked time series NDVI images in ENVI? [closed]

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 ...
2
votes
1answer
600 views

Open and read spectral library as array in Python?

I'm creating a spectral library in envi and I need to read this as an as array in python. I'm trying to use pysptools (pysptools.classification.SAM) package but i don't understand how to do this from ...
2
votes
1answer
293 views

Opening .tab files associated with .lbl files in ENVI

I need to open .tab files containing location information of chandrayaan-1 HYSI dataset. It contains four ASCII columns: longitude, latitude, pixel and scanline data. I need to open the .tab file as ...
3
votes
1answer
843 views

Converting HDF file (MODIS product) in ArcGIS as correctly georeferenced raster by ENVI?

Which algorithm I should use in ENVI 5.2 to open the MODIS product (MOD13Q1 or MODIS/Terra Vegetation Indices 16-Day L3 Global 250m Grid SIN V006), given as HDF file to ArcGIS 10.5 as correctly ...

1
2 3 4 5 6