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2661 Topics and 4640 Replies ENVI  2661  4640
MNF statistics
by  John Galimberti
07 Jan 2021 07:18 AM
2661 4640
MNF statistics
by  John Galimberti
07 Jan 2021 07:18 AM
20 Topics and 48 Replies ENVI LiDAR  20  48
RE: Classification functi...
by  asdfsdf asdfsd
15 Jun 2020 07:05 PM
20 48
RE: Classification functi...
by  asdfsdf asdfsd
15 Jun 2020 07:05 PM
59 Topics and 117 Replies ENVI SARscape  59  117
RE: PSinSAR processing is...
by  Reda Amer
03 Sep 2020 02:37 PM
59 117
RE: PSinSAR processing is...
by  Reda Amer
03 Sep 2020 02:37 PM
4 Topics and 3 Replies ENVI OneButton  4  3
RE: Stitching together ph...
by  Mari Minari
15 Jul 2019 08:50 AM
4 3
RE: Stitching together ph...
by  Mari Minari
15 Jul 2019 08:50 AM
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1 Replies and 636 Views ASTER Crosstalk Correction  636  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
1 636
by  sedat sedatJump to last post
17 Nov 2020 10:34 PM
0 Replies and 7866 Views Sentinel 2 QUAC  7866  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
0 7866
18 Mar 2020 04:02 PM
0 Replies and 4077 Views Georeference with IGM  4077  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 4077
12 Dec 2019 01:31 PM
1 Replies and 866 Views Hyperspectral Image Background Removal  866  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.
1 866
by  Mari MinariJump to last post
02 Dec 2019 11:14 AM
2 Replies and 1763 Views Radiomteric Calibration of WorldView 3 in ENVI 5.5  1763  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 1763
by  Afolarin LawalJump to last post
13 Nov 2019 04:53 PM
2 Replies and 1217 Views How to apply threshold on output Fraction RGB Image from Linear Unmixing tool.  1217  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 1217
by  Nasir HameedJump to last post
02 Sep 2019 01:24 AM
1 Replies and 910 Views Opening an image using xml file  910  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.
1 910
by  Mari MinariJump to last post
29 Jul 2019 05:10 AM
1 Replies and 704 Views Envi 5.5.2 seems to be running slowly  704  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...
1 704
by  Jenny BloomJump to last post
19 Jun 2019 01:49 PM
1 Replies and 714 Views n-D Visualizer and ROI's  714  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...
1 714
by  Jenny BloomJump to last post
06 Jun 2019 10:31 PM
1 Replies and 747 Views Extracting raster values from point vector location  747  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.
1 747
by  Jenny BloomJump to last post
06 Jun 2019 10:20 PM
1 Replies and 2001 Views Error''expression must be a scalar or 1 element array in this context<BYTE array[20]''  2001  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 2001
by  Jenny BloomJump to last post
31 May 2019 11:50 AM
2 Replies and 607 Views ENVI Modeler PanSharpening Batch Processing  607  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 ...
2 607
by  Anna Wojtowicz-NowakowskaJump to last post
15 May 2019 12:50 AM
40 Replies and 2368 Views Creating a region of interest  2368  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 2368
by  Qualys Scan &lt;h1&gt;test&lt;/h1&gt;Jump to last post
04 May 2019 11:12 AM
7 Replies and 1072 Views Mosaicking Sentinel 2 Data  1072  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 1072
by  Cole DevineJump to last post
04 Apr 2019 09:29 AM
7 Replies and 3035 Views Thor de-stripe and Spear vertical stripe removal  3035  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 3035
by  Mari MinariJump to last post
04 Oct 2018 07:42 AM
0 Replies and 1797 Views Radiometric Calibration Processing  1797  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...
0 1797
19 Jun 2018 12:41 PM
0 Replies and 1199 Views Harris  1199  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 1199
11 Jun 2018 12:56 AM
0 Replies and 1392 Views processing of meteosat-8 Indian ocean data coverage (IODC) using Envi 5.3  1392  0 Started by  Deleted User I want to georefrence and process my meteosat-8 Indian ocean data coverage (MSG-1 IODC) in native format (.nat) using Envi5.3 , I tried with envi classic 5.3IDL and Envi5.3 but I couldn't do that. I found an extension in Internet 'ENVI MSG tools' and installed it. after that I could read my native format but when I used 'GEOREFRENCE MSG' option in 'Map' the coordination of my georefrenced map was incorrect, It seems that this extension has a problem with MSG-1 Indian ocean data coverage. what s...
0 1392
29 Apr 2018 07:18 AM
1 Replies and 2224 Views Landsat Images not opening in ENVI 5  2224  1 Started by  Isabel Mendoza When I tried to upload the MTL document into envi 5 it tell me that it is not a Tiff. I was using landsat 5 to 7 TM. I know I am not doing something wrong because Landsat 8 oli and landsat Mss are working just fine. Please help! Thank you
1 2224
by  Mari MinariJump to last post
20 Mar 2018 12:07 PM
1 Replies and 2106 Views IAR Reflectance Correction (and others)  2106  1 Started by  Jose Manuel Lattus Hello! Much time I ask myself why the IAR Reflectance Correction don't allow to use a mask file. Many images have borders and the IAR use the Mean Spectral of all Pixels, so it includes the border and the border have a lot of influence are many pixels (ASTER/LANDSAT)... I think this correction will be better is you only consider the pixels with information. In the same issue, if you previously edit the envi header and set the ignore value to 0 (for example), this will ignore the borders in a ...
1 2106
by  Mari MinariJump to last post
01 Dec 2017 08:12 AM
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