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3 Replies and 1197 Views
ENVI fails on OSX 12.0.1 1197 3
Started by Peter VOGT
Using ENVI 553 on macOS 12.0.1: EnviClassic as well as ENVI start and work fine. Using ENVI 561 on macOS 12.0.1: EnviClassic as well as ENVI fail to start without any error message. Also the LicenseAdministrator application fails to start. Any ideas what changed here ENVI 5.6.1 or how to fix making it work again under Monterey
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1197 |
by Ben Castellani 24 Mar 2022 01:33 PM |
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0 Replies and 852 Views
Average NDVI Per Land Cover Class 852 0
Started by Dylan Johnston
Hi! I'm currently working on a project assessing the reduction in NDVI following a hurricane. I've created pre and post hurricane NDVI images, and have also undertaken a supervised land cover classification of the Landsat 8 imagery. I was wondering if anyone knew how I might go about calculating the average NDVI value per land cover class, so that I can quantify the difference. I would truly appreciate some ideas. Thanks!
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852 |
29 Sep 2021 09:50 AM |
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0 Replies and 943 Views
FLAASH model atmospheric correction error 943 0
Started by Martin Chari
May you please assist with how to resolve this error (ACC error: convert 7). I am trying to convert SPOT 6 from top of atmosphere to surface reflectance.
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943 |
16 Apr 2021 02:00 AM |
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1 Replies and 2733 Views
ASTER Crosstalk Correction 2733 1
Started by Jose Manuel Lattus
Hi! I read that ASTER need crosstalk correction, there is a processing level that have this correction, does ENVI can do this correction in any tool Do you know if ASTL1T needs also crosstalk correction thanks Jose Manuel Lattus
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2733 |
by sedat sedat17 Nov 2020 10:34 PM |
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0 Replies and 9421 Views
Sentinel 2 QUAC 9421 0
Started by Motoshi Honda
I have Sentinel 2A Level 1C imagery from USGS EarthExplore and would like to perform QUAC atmospheric correction, but Sentinel 2A does not appear in the Sensor Type dropdown box of the QUAC window. Which sensor type should I use Can't QUAC handle Sentinel 2A
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9421 |
18 Mar 2020 04:02 PM |
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0 Replies and 5221 Views
Georeference with IGM 5221 0
Started by Silvie Cafarella
I have three ASCII files: 1) pixels values, 2) upper left corner longitudes, and 2) upper left corner latitudes. All three files are 1350 X 1350, left-to-right, top-to-bottom. The coordinates are in a polar stereographic projection with a 4.5km resolution (‘ a=wgs84 proj=stere lat_0=70.0000000 lon_0=-45.000000’). I tried using 'Geoference with IGM', but I either get an error, often 'an attempt to subscript DXS was out of range' or there is an output grid of 77 X 2330, with a weird arrangem...
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5221 |
12 Dec 2019 01:31 PM |
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1 Replies and 1828 Views
Hyperspectral Image Background Removal 1828 1
Started by Catherine Chan
I'm unable to remove or make transparent the black backgrounds that come with my hyperspectral images, making processing and analysis more difficult. I have attempted setting the 'zero' or other black background values as invisible, but I actually can't access metadata editing. When I click on 'edit metadata', a message with 'Parameter; averagepixeldisp, ';averagepixeldisp' is not a valid IDL variable name.' shows up and the program will often close itself after.
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1828 |
by MariM02 Dec 2019 11:14 AM |
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2 Replies and 2985 Views
Radiomteric Calibration of WorldView 3 in ENVI 5.5 2985 2
Started by Jessica Mitchell
Has anyone experienced the Radiometric Calibration tool not working in ENVI 5.5 I am trying to convert World View 3 multispectral file from DN to TOA radiance for FLAASH input. I have tested pretty much all parameters (e.g., radiance, reflectance; float, double; flaash settings; bil, ). The same tool runs in ENVI 5.5 Classic.
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2985 |
by Afolarin Lawal13 Nov 2019 04:53 PM |
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2 Replies and 2048 Views
How to apply threshold on output Fraction RGB Image from Linear Unmixing tool. 2048 2
Started by Nasir Hameed
I am intending to apply threshold on output RGB Fraction Image produced by the Linear Unmixing tool in ENVI. The resultant image consists of three RGB bands (Soil, Vegetation and RMS Error), how would I apply threshold on Soil and Vegetation fractions contained within. Whether I am supposed to add them independently and apply threshold or there is alternate option/tool enabling me directly apply threshold on RGB image to isolate range of pixel values representing vegetation or soil
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2048 |
by Nasir Hameed02 Sep 2019 01:24 AM |
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1 Replies and 2385 Views
Opening an image using xml file 2385 1
Started by Rajeev Bhattarai
Hi, when I try to open a tile of Sentinel-2 file in ENVI using XML file it takes me to a dialogue box with a name 'header info' asking for the number of samples, lines and bands, without doing this, it doesn't allow me to open the image. What am I supposed to specify there Thanks in advance.
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2385 |
by MariM29 Jul 2019 05:10 AM |
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1 Replies and 1774 Views
Envi 5.5.2 seems to be running slowly 1774 1
Started by Charles Umbanhowar
I am running 5.5.2 and am experience slow performance and multiple crashes (at least one time a Kernel error was reported). I am working with a Sentinel -2 Image that 4720 x 2826 which doesn't seem that large. I am trying to run band statistics subsetting with ROAs (14 classes) that I created from a shape file that I imported from ArcMap that has about has about 320000 individual ROAs. Is this where my problem lies All I want to do is summarize band stats by ROA. I have 32 gigs of RA...
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1774 |
by Jenny Bloom19 Jun 2019 01:49 PM |
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1 Replies and 1464 Views
n-D Visualizer and ROI's 1464 1
Started by Nikolaos T
Hi, I am new to ENVI so excuse me if I did not explain in a clear manner my problem. I am trying to create some ROI's using the n-D Visualizer tool &91;for simplicity I have created 6 classes (Class-New)&93;. Of course I have searched for pixels located at the corners of the plot, while rotating the n-D Visualizer. Here is the problem: when I am exporting the ROI's and add them in the Layer Manager there are no pixels/ROI's even though in the n-D Visualizer I have picked more than 100 pixels f...
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1464 |
by Jenny Bloom06 Jun 2019 10:31 PM |
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1 Replies and 2174 Views
Extracting raster values from point vector location 2174 1
Started by Rajeev Bhattarai
Hi, I want to extract the pixel value of the vector points from a stack of raster and secondly I want to establish a rectangle around that point and extract the value in that rectangle. How can I do that Thanks in advance.
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2174 |
by Jenny Bloom06 Jun 2019 10:20 PM |
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4712 |
by Jenny Bloom31 May 2019 11:50 AM |
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2 Replies and 1321 Views
ENVI Modeler PanSharpening Batch Processing 1321 2
Started by Anna Wojtowicz-Nowakowska
I need help setting up a model to batch perform 'NNDiffuse Pan Sharpening'. I have 10 multispectral Landsat images and 10 panhromatich landsat images after Dark Susbtraction process. I want to loop through each 2-image set (multi, panhromatic) and generate a pansharpening output. I tried to do this using 2 datasets, 2 iterators, generate filename, and NNDiffuse Pan Sharpening. I get the error 'Nodes cannot be traced back to more than one iterator: &91;NNDiffuse Pan Sharpening&93;. What is ...
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1321 |
by Anna Wojtowicz-Nowakowska15 May 2019 12:50 AM |
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40 Replies and 5077 Views
Creating a region of interest 5077 40
Started by Rajeev Bhattarai
Hi, I am trying to create region of interests around several vector point locations so that I can extract the raster values out of that region. I have been working with different tools but couldn't find exactly what I am looking for. Really stressed. Can anyone help me Thanks in advance. Rajeev
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5077 |
by Qualys Scan <h1>test</h1>04 May 2019 11:12 AM |
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7 Replies and 2271 Views
Mosaicking Sentinel 2 Data 2271 7
Started by Cole Devine
Hello, I am trying to mosaic 4 scenes of Sentinel 2 data together and the program continues to crash every time i attempt to do so. I know that you cannot mosaic the bands that are different resolutions but i am only trying to mosaic the 10m bands. Does anyone know why this keeps crashing
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2271 |
by Cole Devine04 Apr 2019 09:29 AM |
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7 Replies and 5188 Views
Thor de-stripe and Spear vertical stripe removal 5188 7
Started by JED
Hello, I am trying to remove vertical stripes from an image. I have previously used THOR de-stripe with moderate success. However, this time the results produce a blank raster with all -Nan values. I've also tried to use SPEAR vertical stripe removal, with similar results. The mask highlights all pixels with a value at any mask value, and therefore I cannot complete the wizard to complete Spear destripe. The original image looks fine in Envi. I have verified that the original raster has va...
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by MariM04 Oct 2018 07:42 AM |
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0 Replies and 2898 Views
Radiometric Calibration Processing 2898 0
Started by Deleted User
I am using my own atmospheric correction method to determine bottom of atmosphere radiance of Worldview 2 data, and want to apply the radiometric calibration tool to convert the resulting image to BOA reflectances using the equation (pi.L.d^2)/(Esun.sin(theta)) as provided in the ENVI documentation. My routines remove much of the original metadata that came with the imagery. That documentation states 'If the input file does not contain metadata for reflectance gains and offsets, ENVI computes T...
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2898 |
19 Jun 2018 12:41 PM |
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0 Replies and 2344 Views
Harris 2344 0
Started by Belgin Basriev
Hello! I want to ask if it is possible to find underground tunnels with Harris Geospatial Solutions What else besides the software will I need Thanks!
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2344 |
11 Jun 2018 12:56 AM |