Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [envi]

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

0
votes
1answer
19 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'...
0
votes
0answers
15 views

Pleiades atmospheric correction

I have phr1a and phr1b images (Pleiades) and I need to make atmospheric correction. First, I tried to do this by using Envi FLAASH. by the way, I tried also ERDAS atcor but there was also same ...
1
vote
0answers
29 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 ...
-1
votes
0answers
8 views

MTMF classification with ENVI 5.1

How do I classify a multi-spectral raster (Landsat 8 OLI) with MTMF classification? A tutorial in Harris Geospatial is still using the old version of ENVI (4.7 I think), because I tried to follow it, ...
0
votes
1answer
21 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 ...
0
votes
1answer
105 views

Radiometric, reflectance and atmospheric correction for Landsat 8 image

I am struggling with the pre-processing process for landsat8 imagery. I want to use some indices (e.g. NDVI, SAVI, EVI, NDMI) and create a land cover map at the end using ENVI and ArcGIS. As a ...
0
votes
1answer
29 views

“BAD_ALLOC Memory” PSI on ENVI

I'm currently working on S1-images, and I want to process PSI on them. I use ENVI 5.5 with SarScape. Here are the steps I followed : I opened 23+1 images (Import Data) and I cropped them using SAR ...
0
votes
0answers
86 views

Convert bsq files to tiff files in python

I am trying to convert multiple bsq files to tiff but I am getting a black outup. I think that it is something related to the scale but I have tried a couple of things that do not work. What should be ...
0
votes
1answer
69 views

I can apply tasseled Cap transformation in surface reflectance (not ToA)?

I can not understand if I should adjust the Tasseled Cap index with the surface reflectance values or the Top of Atmosphere
0
votes
0answers
19 views

Zenith and Azimuth Angles of OLI sensor of Landsat 8 [duplicate]

I am working with l8. How i can calculate Zenith and Azimuth Angles of for Landsat 8?
1
vote
0answers
37 views

When to rescale reflectance data to calculate vegetation indices

I'm attempting to calculate a number of vegetation indices using hyperspectral AVIRIS data in ENVI. Some of these indices are normalized, such as NDVI, whereas others are not, such as the Transformed ...
0
votes
0answers
71 views

Converting SPOT 6 and 7 DN to Top of Atmosphere Radiance/Reflectance for use in envi

I am used to working in envi, but I do not really understand using SPOT image data. I have obtained SPOT 6 and 7 image data in order to convert the DN value to reflectance value for use / analysis in ...
0
votes
1answer
91 views

Using COSI Corr Interior Orietation Fiducial Marks in UAV Imagery?

I am working on COSI Corr an ENVI Plugin, i am using it for Landslide Displacement using UAV Imageries. How do I select fiducial marks? I dont know what does it mean by "X loc (pix) and Y loc (Pix) ...
0
votes
1answer
23 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?
1
vote
0answers
11 views

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 ...
0
votes
0answers
61 views

ENVI seamless mosaic incorrectly altering data?

I'm using ENVI 5.2 build 9/28/2014. I'm using AVIRIS data and calculated a vegetation index for six adjacent flight lines. For each individual flight line I know I calculated the index correctly, ...
2
votes
0answers
42 views

NoData and Multiband Calculations

I was recently trying to perform some band math calculations in multiband images. I have a big chunk of images witch contains more than 300 bands (dates) each. So I first choosed ENVI to do this ...
0
votes
0answers
65 views

Creating shapefile for ENVI in MATLAB

I am new to ENVI. I want to create a shapefile in the Matlab and export into ENVI. I used the MATLAB shapewrite(data,'ROI.shp'). It generated shapefile, but when I uploaded to ENVI it didn't show ROI. ...
0
votes
0answers
57 views

Endmember batch processing in ENVI - linear spectral unmixing

I am trying to run linear spectral unmixing on a few hundred Landsat images. I am using this Harris Geospatial ENVITask example as a basis for batch processing these images. However, I want to select ...
0
votes
0answers
49 views

Using the Triangulation Method in ENVI's Gapfill tool

There is tool in ENVI, Landsat gapfill , is there any documentation on how the triangulation method works? Can anyone please explain how that particular method works in landsat gapfill tool?
2
votes
0answers
538 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 ...
1
vote
0answers
75 views

masking in ENVI [closed]

I have surface reflectance generated NDVI which I got from ESPA interface, https://espa.cr.usgs.gov. How do I mask cloud with Qa band in ENVI?
1
vote
0answers
27 views

white image while Trying to mosiac two hyperspectral data in ENVI

I am trying to mosaic two aviris-ng georefrenced hyoerspectral data but one of them become white in preview. so I am not able to mosaic the image.enter link description here error ink
0
votes
0answers
39 views

Open file with .slc extension with ENVI 5.2?

I just can't open it with ENVI 5.2. I got this Single Look complex (.slc) extension after analyze images with StaMPS (Stanford Method for Persistent Scatterers) from the raw images. I lost my raw ...
1
vote
0answers
37 views

Applying a mask when running MESMA using VIPER tools plugin for ENVI

I am running MESMA on a landsat image that has large areas masked out, but I keep having all the background (value = 0 in all bands) pixels included in the analysis. They all end up unmodeled (no ...
0
votes
0answers
267 views

Atmospheric Correction of Sentinel-2 using QGIS

How can I get the ENVI output format from the Sentinel-2 images after Atmospheric Correction in QGIS ?
-1
votes
1answer
114 views

Is it required to do DOS using Sentinel 2 image for land cover change detections

Sentinel 2 imagery is already ortho-corrected and georeferenced. However I wish to know how important it is to correct further and which correction to carry out.
0
votes
0answers
142 views

Confusion Matrix for a binary raster

I have a raster GeoTIFF with two classes (1 and 0) which was produced with gamma from a SAR image, so therefore no "real" change detection because it was classified based on texture characteristics. ...
2
votes
1answer
31 views

Direct input of Bias and gain value?

I have facing a problem on arranging the SAM Classification on ENVI. I applied the Landsat 8 and want to classify the area using SAM on my private libraly, thus the system notice that for band 9 to 11 ...
1
vote
0answers
76 views

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, ...
2
votes
0answers
87 views

Supervised classification using endmember spectra (using ENVI 5.1)

We are trying to map land cover classes over a small watershed. We have selected training sites (during a field campaign in early 2017) and determined their spectral profiles on a Landsat 8 image ...
0
votes
1answer
129 views

Apply mask in bulk ENVI

I have a stack of MODIS images consisting of 400+ bands. A stack of NaN masks is created corresponding to each layer of the MODIS stack. I wonder if there is a way to apply the mask layers in bulk in ...
0
votes
1answer
70 views

Why ENVI IDL writing gifs upside down?

I have a binary classification file shows urban areas. I need to convert this file to 8 bit unsigned integer GIF format. ENVI can't save images as GIF so I've used IDL and write a few lines to ...
0
votes
1answer
192 views

How to export latitude and longitude values of each pixel corner? [closed]

I want to extract latitude and longitude values for each pixel's corner of a TIFF image. The latitude and longitude values for the top right and top left are known. How should I perform this task in ...
0
votes
2answers
103 views

NDVI from ENVI to Arcmap stretched value

I calculated NDVI in ENVI by band math. When I drag and drop the image in ArcMap it becomes a black image with stretched value =0 for all pixels. However, by identity clicking each pixel has a value ...
0
votes
1answer
100 views

Batch ENVI IDL PointCloudFeatureExtraction results in unprocessed areas [closed]

I have an IDL-ENVI code to batch PointCloudFeatureExtraction for lidar tiles across a large area, however, when run, the output results in lower areas of each tile as "unprocessed". So my question is ...
0
votes
1answer
243 views

Generating confusion matrix using classified image with geotiff format?

I am working on yielding a confusion matrix with importing an image which is a geotiff format. After classified by a python program, The image has two values (two classifications). However, when I ...
1
vote
1answer
76 views

Again Band swap when reading created image with Gdal

As previously seen here I created a function to save a raster with gdalon python: def array2raster2(fname, rasterOrigin, pixelWidth, pixelHeight,array, proj, shape): originX = rasterOrigin[0] ...
0
votes
1answer
143 views

Topographic correction in ENVI

I work with LS8-data in a mountainous area where the illumination is poor especially in the winter months. My thought is to use either a shadow mask or apply topographic correction. I will use all ...
1
vote
0answers
89 views

Scaling surface reflectance product in ENVI?

I am using ENVI 5.4, specifically 'Data Stretch' tool in a bid to scale down my Landsat 8 OLI surface reflectance product values. I have populated the dialogue box (as below) and compared the ...
0
votes
0answers
82 views

Removing “Bow-tie deletion line ” from my raster dataset

I am working on VIIRS SDR dataset where I have created geolocated and projected raster of "BrightnessTemperature" using "Latitude" and "Longitude" dataset given in HDF5 format using ENVI. Now my study ...
2
votes
0answers
21 views

Register an image using mutual information

I want a procedure for registering two images based on their mutual information. I took a pair of georeferenced radar images of the same location, edited the metadata of one so its position was off by ...
0
votes
1answer
376 views

Convert netcdf file to tiff (with spatial referencing information preserved)

I was trying to convert a netcdf file (~5 GB in size) to a tiff format using both Gdal_translate and ENVI. Was successful in ENVI but I'm missing spatial information. Using gdal_translate (...
1
vote
0answers
57 views

Interpretation of local incidence angle map obtained from ENVI

I obtained a Local Incidence Angle (LIA) map from ENVI while geocoding an ALOS satellite SLC image. It is said in the documentation of ENVI that the LIA map (in .tiff format) contains the angle at ...
2
votes
0answers
173 views

Computing stats with data ignore values - ENVI classic

I'm using ENVI classic (5.4.1) and trying to compute basic statistics from a Landsat-8 scene. When I mask out certain pixels (water set to 'No Data', for instance) the built-in ENVI statistics still ...
1
vote
1answer
485 views

TypeError: 'BilFile' object does not support item assignment

I want to use Python and Spectral library to open a hyperspectral image as ENVI file (.hdr + .dat), rewrite some bands and then save the file in the same format. I have problem with this: "...
2
votes
1answer
117 views

Opening rrd file in ENVI 5.3

I have three files with RRD extension, which are data files for ASTER and I do not know how to open them in ENVI 5.3?
1
vote
1answer
46 views

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 ...
2
votes
1answer
155 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
1answer
324 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 ...