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0 Replies and 1268 Views
ENVI Crop Science 1.0 release 1268 0
Started by Scott Paswaters
I am excited to announce that ENVI Crop Science 1.0 is now available. This new product provides remote sensing analytics for precision agriculture and agronomy. It is designed to work with satellite, aerial, and UAV imagery in both a desktop and enterprise environment. Functionality includes: crop counting, crop metrics (crop health), and hotspot analysis. For more information please visit http://www.harrisgeospatial.com/ProductsandTechnology/Software/ENVI.aspxprecisionag. Please contact yo...
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1268 |
12 May 2017 02:10 PM |
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1 Replies and 371 Views
ENVIPointCloudViewer not supported on linux 371 1
Started by John Meyer
Hello, I am running Ubuntu 16.04 and ENVI 5.4. I installed ENVI yesterday. I tried to open a .las file and I get an error 'ENVIPointCloudViewer not supported on linux' Additionally, I am unable to copy a file path (or anything) into the directory path window at the open file GUI - not sure if that is a bug or if that is the excepted functionality. Thanks for any help. John
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371 |
by Jason Wolfe 09 May 2017 07:21 AM |
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2 Replies and 413 Views
ASTER L1T FLAASH Error 413 2
Started by Praveen Kumar
Hi, FLAASH module is throwing error, when I want to do atmospheric correction on VNIR and SWIR bands of ASTER L1T . The error is 'Input image has more bands (9) than expected for the selected sensor (14). Please check the sensor type or set to UNKNOWN-MSI if using a custom filter function'. What can be the cause for the error Thanks.
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2 |
413 |
by Praveen Kumar02 May 2017 11:57 PM |
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6 Replies and 446 Views
FLAASH 446 6
Started by Shuangyan He
When I tried to using ENVI FLAASH to do the atmospheric correction for MISR data over water, it reminded me to input the 'filter Function File' in Multispectral Settings. After I input the sensor spectral response file, it reminded me the error of 'Attempt to subscript FF_WL with is out of range'. Is this because the MISR sensor has limited bands, as it only has four bands of 446, 558, 672 and 866nm Thanks!
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6 |
446 |
by Shuangyan He01 May 2017 10:24 AM |
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1 Replies and 349 Views
Help Intalling ENVI 5.3 349 1
Started by adams kpewa
Hello All,
Can someone help me with steps to install ENVI 5.3 on a Linux ( red hat 6.x ) virtual machine( command line) please . I have Extracted the tar file but I can see so many files and I have no idea which ones I should copy to my server and start the installation. Thanks in advance
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1 |
349 |
by John Meyer29 Apr 2017 10:19 AM |
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10 Replies and 354 Views
ENVI Crashes on Linux 354 10
Started by Rowan Gaffney
Hello, I am running ENVI and IDL on Ubuntu 16.04 LTS. At first it was working fine, but now it keeps crashing all the time. This is the error I get:
A fatal error has been detected by the Java Runtime Environment:
SIGSEGV (0xb) at pc=0x00007f98ea5e7d8b, pid=3863, tid=140296014931712
JRE version: 7.0_25-b15
Java VM: Java HotSpot(TM) 64-Bit Server VM (23.25-b01 mixed mode linux-amd64 compressed oops)
Problematic frame:
C &91i965_dri.so0x20ad8b&93 _init0x1bf86b...
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10 |
354 |
by John Meyer29 Apr 2017 10:01 AM |
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1 Replies and 430 Views
Intrepretation of MNF eigenvector matrix 430 1
Started by Rami Piiroinen
Hi all, I performed minimum noise fraction transformation on a hyperspectral image with 129 bands. This produces 129 new bands, as it should. Okay, then I get the eigenvalues that I can use to interpret which bands contain information and which bands contain noise. Now I need to understand which bands constituted most to each new MNF band. To my understanding we need to look at the eigenvector matrix to see the 'loading' from each original band. But, which way should we look at the matrix...
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430 |
by Mari Minari26 Apr 2017 02:12 PM |
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0 Replies and 467 Views
Convert radiance to reflectance 467 0
Started by Katie
I'm working on a project using hyperspectral data collected in a greenhouse. The data is in radiance (mW/m^2*2str*nm) and I'm trying to convert this to reflectance. We did take images of the calibration board before collecting the data. This white and dark calibration board is in the first image but none of the subsequent images. What would be the simplest way to convert the data to reflectance (I don't have the license for FLAASH.)
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467 |
25 Apr 2017 10:37 AM |
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1 Replies and 356 Views
Generate Point CLoud Error 356 1
Started by Alexandra Skachkova
I've been testing Generate Point Cloud from stereo images on WorldView-1/2, GeoEye and QuickBird data in ENVI 5.4. But in most the cases ENVI returns message "Generating point clouds requires at least two rasters in the supportes formats", while all the images contain RPC, overlap more than 50 and listed in supported data types. Exporting data to ENVI format with a generic RPC sensor model doesn't help. What can be the cause of the error Are there any limitations for this tool not l...
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356 |
by Peg Shippert17 Apr 2017 01:12 PM |
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3 Replies and 285 Views
Computing Vegetation Indices from Difference Landsat Sensors 285 3
Started by Nasir Hameed
I am working to estimate Above Ground Biomass (AGB) using ground sample data and then intending to work out its potential relationship between different vegetation indices like NDVI, RVI, DVI, SAVI, MSAVI etc. This relationship will be ascertained using regression equation. Resultantly, I will be able to predict AGB of earlier date after choosing suitable index to proceed with. I am using images from two different sensors, Landsat 8 OLI (January 2017) and ETM (January 2007) to derive above note...
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by Nasir Hameed15 Apr 2017 07:23 AM |
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4 Replies and 318 Views
rotate raster does not behave as expected 318 4
Started by Andy Kellett
Hi, I am trying to rotate a large orthophoto with row crops to see the effect that will have on susceptibility to moire when I resize. I applied rotations of 17 and 23 degrees in the rotate/flip raster tool. In both instances I can see small changes in the image at small scales (fine patterns in the edges of the rows changed) but the overall row angle remained exactly the same. I expected the whole image to rotate by the amount I entered, and so I expected to see the row angle noticeably chan...
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4 |
318 |
11 Apr 2017 12:17 PM |
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1 Replies and 348 Views
image translation while apllying a second mask 348 1
Started by max rouch
Hello, First of all, sorry if the question is stupid, but I am still a beginner in remote sensig, I work with ENVI 5.1 on Landsat 8 images. I want to apply cloud masks on a same image ( a NDVI created from landsat 8 bands ). I created the cloud masks from the QA band of Landsat 8, the first cloud mask is a classic one, made for masking the clouds of the image, the second one correspond to the opposite of the cloud mask of another image, the purpose here is to retrieve the pixels that are without...
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1 |
348 |
11 Apr 2017 02:21 AM |
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0 Replies and 401 Views
Fmask Cloud Cover Overestimation 401 0
Started by Alexandra Skachkova
I've been testing Calculate Cloud Mask Using Fmask tool in ENVI 5.4 on Sentinel-2 and Landsat-8 data and results have been unsutisfactory. Algorithm tends to overestimate cloud cover and classify bright soils, snow, artificial structures and sometimes even vegetation as clouds. Futhermore, shadows stay undetected, while original algorithm detects cloud shadows as well. Additionally, different configuration parameters doesn't have any affect on results.
Have somebody expirienced the same proble...
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401 |
10 Apr 2017 08:58 AM |
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3 Replies and 358 Views
ML classification performing process: how pass the statistics from a roi 358 3
Started by Lorenzo Bernardi
Hi all, i am trying to perform a ML classification using ENVI API ENVIMaximumLikelihoodClassificationTask.
I had seen the example https://www.harrisgeospatial.com/docs/ENVIMaximumLikelihoodClassificationTask.html where it is used a vector to calcolate the needed statistics.
How implemenmt the same ML workflow using a set of ROI in xml or envi classic .roi format
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3 |
358 |
06 Apr 2017 07:00 AM |
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1 Replies and 360 Views
How create a lookup array for the ENVI_DO_IT Net Neural Classification 360 1
Started by Lorenzo Bernardi
Hi all,
i need to perform a Net Neural Classification using EVI:NEURAL_NET_DOIT api function.
My input raster is a 7 bands ENVI file (.dat extension) and my training ROI file has 5 class (vegetation, water, sand, groung, build).
Full code follows:
COMPILE_OPT IDL2
envi ;, /restore_base_save_files
ENVI_BATCH_INIT
output_nn = classfication_output
output_nnrule = rulke_classification_output
; variabili globali
inputsms = myraster
; aggiungere apertura file raster con est...
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1 |
360 |
06 Apr 2017 05:19 AM |
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5 Replies and 356 Views
How modify the pixels value inside a ROI 356 5
Started by Lorenzo Bernardi
Hi all, i need to execute a change detection with the certainty of obtaining a result in term of change from vegetation class to built class.
I use the SVM classifier.
In order to obtain at least a result i would artificially change the pixels values inside a ROI.
Thank you for any Suggestion
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5 |
356 |
04 Apr 2017 03:02 AM |
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0 Replies and 379 Views
Advanced use of idlpy bridge: open-close license management 379 0
Started by Lorenzo Bernardi
Hi all,
i have a python script that calls and executes some python function making idl processes following the IDL.run('instruction') syntax.
More in detail, i have a set of function making "radiometric correction", "pansharpening" "layer stacking", and so on.
I make the import of idlpy module ad the begin of my file. The problem is that license remains busy throughout the execution duration.
I try also to make the import only from the function.
There is a way to im...
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379 |
03 Apr 2017 03:16 AM |
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10 Replies and 366 Views
Resizing raster cuts and shifts image 366 10
Started by Andy Kellett
Hi,
Has anyone seen this I'm resampling a moderate raster (118 MB, 8-bit grayscale) 8 --> 1 with cubic convolution. When its done, the image has been sliced vertically and re-shuffled. I can't show the data, but schematically it looks like this:
before after
abcdefghijk defghijkabc
abcdefghijk defghijkabc
abcdefghijk defghijkabc
abcdefghijk defghijkabc
...
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10 |
366 |
by Mari Minari30 Mar 2017 10:38 AM |
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331 |
28 Mar 2017 11:11 PM |
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1 Replies and 322 Views
Reprojecting and Resizing Rasters 322 1
Started by Brianna Lind
I have two raster files, A and B (see Table below). I am looking to reproject B to the same projection as A, and also resize (aggregate) pixels in B to the same size as A (0.5 x 0.5 degrees) so they can be stacked. I have been trying to reproject raster B to the same gcs as A using the "Reproject Raster Tool" and selecting the coordinate system to reproject to using the "import from existing data set icon". This works fine, but I've noticed that when B is projected into degr...
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1 |
322 |
26 Mar 2017 10:46 AM |