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16 Replies and 493 Views Problems using FLAASH for Worldview-3 data  493  16 Started by  Liam Clark I am attempting to use the FLAASH module on WV3 imagery but get an error saying 'Input image has more bands (8) than expected for the selected sensor (16)...' I have already used the Radiometric Calibration module to convert the raw WV3 imagery, and selected the 'FLAASH options' button when doing so. I'm really stuck on interpreting the error message as FLAASH correctly identifies the imagery as WV3 and automatically fills in the fields, so any help would be much appreciated! There's also the se...
16 493
by  Tharindu AbeysingheJump to last post
14 Jun 2018 07:57 PM
3 Replies and 37 Views ENVI 5.5: How to add a new spectral library  37  3 Started by  Ludovic Legros Hello, I would like to use a spectrum I downloaded, but I didn't succeeded to load it in ENVI. I have a .txt files like this one: S07WV3 Record=4157: Montmorillonite-Na CU93-52A BECKc AREF 1.9322328e-001 2.5150448e-001 3.4166631e-001 4.2895776e-001 4.5956072e-001 4.8911583e-001 5.0407648e-001 5.0435984e-001 5.2898306e-001 5.2644795e-001 5.3021705e-001 5.2787507e-001 4.7677675e-001 4.5206088e-001 4.5573318e-001 4.3987176e-001 Can you help me figure this...
3 37
by  Mari MinariJump to last post
14 Jun 2018 10:05 AM
2 Replies and 26 Views ENVI 5.5: Percentiles  26  2 Started by  Ludovic Legros Hello, I have a band ratio image and I would like to save the image as a geotiff and just include the 90th percentile. Do you have an idea to do that precisely without using Interactive Stretching Thank you, Ludovic
2 26
by  Ludovic LegrosJump to last post
14 Jun 2018 07:46 AM
2 Replies and 41 Views ForwardPCATransform Parameters  41  2 Started by  Alireza Taravat I would like to apply 'Forward PCA Rotation New Statistics and Rotate' model in ENVI on 500 images using 'ForwardPCATransform' task, but I could not find any document about the 'ForwardPCATransform' task parameters. For Example how to define 'Mask Band' or how to define 'Stats Subset' or 'output State file name' or calculate using 'Covariance Matrix or Correlation matrix' or 'Number of Output PC Bands'. Any idea Thanks
2 41
by  Alireza TaravatJump to last post
09 Jun 2018 03:42 AM
1 Replies and 21 Views Modify Preferences  21  1 Started by  Dion Kucera I'm using ENVI 5.2. I want to change the 'processing tile size' preference under file -->preferences, as described here: http://www.harrisgeospatial.com/docs/Preferences.html However, my preferences options ends at 'Display Errors on Screen', and the 'processing tile size' menu isn't even visible. Is there some other way to modify this option in ENVI Thanks.
1 21
by  Mari MinariJump to last post
07 Jun 2018 06:03 AM
1 Replies and 27 Views Exact spectral bands for NDVI  27  1 Started by  Hamid Dashtiahangar I have a hyperspectral image and am using vegetation index calculator to calculate NDVI. My question is what are the exact bands that ENVI uses for NDVI band calculation in the documentation, it says NIR and Red which is a broad definition. I couldn't find the narrowband NDVI bands.
1 27
by  Mari MinariJump to last post
06 Jun 2018 10:55 AM
5 Replies and 170 Views MNF and Hyperion  170  5 Started by  Guy Serbin Greetings, I am trying to perform a Forward MNF Rotation using noise statstics from a Hyperion scene, and am consistently receiving the same error regardless of how many bands or spatial extent that I have run through the MNF. When I run the MNF, I receive the following error: "The numer of pixels in the shift difference spatial subset should be greater than the number of input bands. Please enlarge the spatial subset for noise statistics." I have tried this in both ENVI ...
5 170
by  Mari MinariJump to last post
05 Jun 2018 10:30 AM
2 Replies and 56 Views Atmospheric correction with Worldview 3 image  56  2 Started by  Tharindu Abeysinghe I have a worldview 3 image (Level 1B product with 17 bands, 1 Pan, 8 MS, and 8 SWIR). I need to apply an atmospheric correction to the image. After I apply radiometric calibration with ENVI 5.4, SWIR bands result in no data pixels in some areas covered with water. This happens with both FLAASH settings and default settings in radiometric calibration. As I understand, only option I have with ENVI is I can apply QUAC for the original image. Then apply (B1 le 0)*0(B1 ge 10000)*1(B1 gt 0 and B1 lt...
2 56
by  Tharindu AbeysingheJump to last post
04 Jun 2018 09:05 PM
1 Replies and 58 Views Modeler process  58  1 Started by  Joselyn Lizzet Montalban Sánchez i try to work in the modeler for doing calibration and make a mosaiking, because i work with many imagenes, but it result a little difficult because in the mosaiking process when i want to select the imagen which i want to be the 'Reference'. i would like some help for doing this. Also, i would like to know if is it possible to conect that process with a decision tree. thank you
1 58
by  Mari MinariJump to last post
29 May 2018 11:36 AM
1 Replies and 25 Views No Data Problem in Calculations  25  1 Started by  Caio Petri Hi there, I was recently searching for a solution for not considering NoData values in ENVI calculations, but I was not able to find any solution in the user guides or even online. Basically, I have a big chunk of images organized in large time series, witch results in more than 300 bands (dates) images. My initial purpose is to calculate a few statistics based on this images, followed by vegetation indexes (per date). Obviously, NoData (witch in my MODIS images have the value of -9999) can ...
1 25
by  Mari MinariJump to last post
29 May 2018 10:45 AM
1 Replies and 27 Views Surface Temperature in Landsat 5 TM  27  1 Started by  Jose Manuel Lattus Hello! For get Surface temperature in Lansat7, 8 and ASTER y follow this steps. 1) Radiometric Calibration (radiance). 2)Thermal Atmospheric Correction. 3) Emissivity Normalization. But in Landsat 5 is not possible to run 'Atmospheric Correction' because it needs more than one thermal band! The Brightness Temperature I can get using Radiometric Calibration is not comparable to Surface Temperature. So, I can jump the 'Atmospheric Correction' and just use 1) Radiometric Calibration. 2)Emissivity N...
1 27
by  Mari MinariJump to last post
29 May 2018 10:28 AM
3 Replies and 207 Views Tasseled Cap in Landsat 8  207  3 Started by  Jose Manuel Lattus Hello! I know that TassCap use coefficients derived from Landsat images (MMS, TM), in case of Landsat 8 it's necesary to redefine those coefficients What if I perform a Spectral Subset to Landsat 8, saving just the same 6 bands present in Landsat 7 and apply the Tasseled Cap transformation in ENVI selecting this Pseudo Landsat 7 TM (derived from Landsat 8) thanks for any comment José Manuel Lattus
3 207
by  Larry BonneauJump to last post
23 May 2018 10:25 AM
2 Replies and 134 Views Forward MNF to Spectra  134  2 Started by  Ludovic Legros Hello, I'm trying to use the tool 'Forward MNF to spectra' to realize a MTMF. However, I tried different spectra from the USGS library and I got eveytime the same MNF spectra no matter what spectra I choose (alunite, opal, chlorite, ...). I probably did a mistake somewhere. Is it a problem from the tool, or the MNF Thank you, Ludovic
2 134
by  Ludovic LegrosJump to last post
03 May 2018 07:19 AM
2 Replies and 126 Views Sentinel-2 XML Error  126  2 Started by  Grant Pearse Hi, I am aware of the previous issues opening long filenames or opening Sentinel-2 L1/L2 images in older versions of ENVI but the issue seems to have cropped up again with the latest version of ENVI in combination with the latest outputs from Sen2Cor. I processed some L1C images to L2A using Sen2Cor 2.5 and attempted to open them using ENVI 5.5 from the XML file. Immediately after the first 'Reading Sentinel 2' dialog box I get a second dialog box saying 'ENVI Error: IMAGEINFO.' The files...
2 126
by  Grant PearseJump to last post
26 Apr 2018 02:14 PM
0 Replies and 52 Views Sentinel-2 XML Error  52  0 Started by  Grant Pearse Hi, I am aware of the previous issues opening long filenames or opening Sentinel-2 L1/L2 images in older versions of ENVI but the issue seems to have cropped up again with the latest version of ENVI in combination with the latest outputs from Sen2Cor. I processed some L1C images to L2A using Sen2Cor 2.5 and attempted to open them using ENVI 5.5 from the XML file. Immediately after the first 'Reading Sentinel 2' dialog box I get a second dialog box saying 'ENVI Error: IMAGEINFO.' The files...
0 52
25 Apr 2018 04:48 PM
1 Replies and 97 Views FLAASH crashing (ACC error: archive file header)  97  1 Started by  Joshua Kelly Hello, I am trying to perform atmospheric corrections on PlanetScope 3m imagery using FLAASH but the tool is crashing with the following dialogue: https://imgur.com/a/8g1fxQy I should mention that I had to import my own Spectral Library as ENVI hasn't yet set one up for Planet. Can anyone diagnose what the problem is here Thank you in advance, Josh
1 97
by  Mari MinariJump to last post
23 Apr 2018 08:54 AM
3 Replies and 102 Views DarkSubtractionCorrection Task  102  3 Started by  Russell Ives I created a short API to take radiometrically calibrated, top of atmosphere reflectance data from Woldview 2 image and apply the DarkSubtractionCorrection Task to it. Where ever the pixel_state was set to 1, data values to ignore set to 0 in the input image, returns negative values in the resulting output image. How can this be corrected so the result doesn't apply the subtraction to the pixels to ignore
3 102
by  Mari MinariJump to last post
23 Apr 2018 08:50 AM
1 Replies and 98 Views Export to ENVI failing  98  1 Started by  Adam Levine Hi guys, I am trying to export to ENVI an resampled L2A product, but the process completes only to 60 or so, and then it disappears. When I check the folder selected for export, I can only notice a folder called product_name.data and inside of it there is a 'vector_data' folder and 4 files (2 .hdr and 2 .img). I know that I should be expecting a single product_name.hdr file. Isn't this correct Also when I want to open the original file in ENVI it tells that is not a valid Sentinel 2 pro...
1 98
by  Mari MinariJump to last post
19 Apr 2018 12:41 PM
0 Replies and 107 Views A IDL script for the decision tree  107  0 Started by  Lorenzo Bernardi How can I perform a raster classification using a decision tree by running an IDL script I just know the logic sintax and how write it into IDL, but I do not undestrand how produce a classification layer with 5 classes performing the execution of a decision tree by using ENVI API or IDL script. Thank you for any suggestion.
0 107
10 Apr 2018 02:00 AM
1 Replies and 153 Views ENVI 5.5 Apply mask  153  1 Started by  jucasas I installed version 5.5 of the ENVI, and I want to apply a mask to an image to assign NaN values, but when looking for this tool in the ENVI menu, I could not locate it. In this new version there is a tool that replaces the 'Apply MAsk' Best regards. Juan Casas
1 153
by  Mari MinariJump to last post
09 Apr 2018 01:51 PM
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