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2684 Topics and 4677 Replies ENVI  2684  4677
Confusion matrix bug
by  Enayat Aria
01 Dec 2021 03:28 AM
2684 4677
Confusion matrix bug
by  Enayat Aria
01 Dec 2021 03:28 AM
20 Topics and 48 Replies ENVI LiDAR  20  48
20 48
64 Topics and 120 Replies ENVI SARscape  64  120
RE: Sentinel-1 Auxiliary ...
by  Mari Minari
22 Dec 2021 06:18 AM
64 120
RE: Sentinel-1 Auxiliary ...
by  Mari Minari
22 Dec 2021 06:18 AM
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2 Replies and 113 Views ENVI fails on OSX 12.0.1  113  2 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
2 113
by  Peter VOGTJump to last post
08 Dec 2021 04:42 AM
0 Replies and 149 Views Average NDVI Per Land Cover Class  149  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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29 Sep 2021 09:50 AM
0 Replies and 361 Views FLAASH model atmospheric correction error  361  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.
0 361
16 Apr 2021 02:00 AM
1 Replies and 1564 Views ASTER Crosstalk Correction  1564  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
1 1564
by  sedat sedatJump to last post
17 Nov 2020 10:34 PM
0 Replies and 8458 Views Sentinel 2 QUAC  8458  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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18 Mar 2020 04:02 PM
0 Replies and 4395 Views Georeference with IGM  4395  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...
0 4395
12 Dec 2019 01:31 PM
1 Replies and 1246 Views Hyperspectral Image Background Removal  1246  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.
1 1246
by  Mari MinariJump to last post
02 Dec 2019 11:14 AM
2 Replies and 2273 Views Radiomteric Calibration of WorldView 3 in ENVI 5.5  2273  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.
2 2273
by  Afolarin LawalJump to last post
13 Nov 2019 04:53 PM
2 Replies and 1527 Views How to apply threshold on output Fraction RGB Image from Linear Unmixing tool.  1527  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
2 1527
by  Nasir HameedJump to last post
02 Sep 2019 01:24 AM
1 Replies and 1509 Views Opening an image using xml file  1509  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.
1 1509
by  Mari MinariJump to last post
29 Jul 2019 05:10 AM
1 Replies and 1145 Views Envi 5.5.2 seems to be running slowly  1145  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...
1 1145
by  Jenny BloomJump to last post
19 Jun 2019 01:49 PM
1 Replies and 996 Views n-D Visualizer and ROI's  996  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...
1 996
by  Jenny BloomJump to last post
06 Jun 2019 10:31 PM
1 Replies and 1287 Views Extracting raster values from point vector location  1287  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.
1 1287
by  Jenny BloomJump to last post
06 Jun 2019 10:20 PM
1 Replies and 3293 Views Error''expression must be a scalar or 1 element array in this context<BYTE array[20]''  3293  1 Started by  Yassine Manyari Hello! I'm trying to add the RPC coefficients manually in the tab ''Edit Envi header'' but it shows me an error entitled : ''expression must be a scalar or 1 element array in this context
1 3293
by  Jenny BloomJump to last post
31 May 2019 11:50 AM
2 Replies and 868 Views ENVI Modeler PanSharpening Batch Processing  868  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 ...
2 868
by  Anna Wojtowicz-NowakowskaJump to last post
15 May 2019 12:50 AM
40 Replies and 3598 Views Creating a region of interest  3598  40 Started by  Rajeev Bhattarai
(Topic has multiple pages1 2 3 )
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
40 3598
by  Qualys Scan &lt;h1&gt;test&lt;/h1&gt;Jump to last post
04 May 2019 11:12 AM
7 Replies and 1628 Views Mosaicking Sentinel 2 Data  1628  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
7 1628
by  Cole DevineJump to last post
04 Apr 2019 09:29 AM
7 Replies and 3912 Views Thor de-stripe and Spear vertical stripe removal  3912  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...
7 3912
by  Mari MinariJump to last post
04 Oct 2018 07:42 AM
0 Replies and 2136 Views Radiometric Calibration Processing  2136  0 Started by  Russell Ives 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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19 Jun 2018 12:41 PM
0 Replies and 1562 Views Harris  1562  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!
0 1562
11 Jun 2018 12:56 AM
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