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1 Replies and 21 Views ENVI modeler specify stretch with Max and Min value  21  1 Started by  Morgan Bond I am trying to use ENVI modeler to speed up my raster stretch process for many images. However, one aspect that slows me down is that I would like to perform a square root stretch in envi modeler. To do this I need to first calculate statistics for each file, and add in the min and max values as a vector for each band (e.g. &91;12,74,160,619,42,138,1293&93;). Is there a way to speed this up by specifying that I just want the module to use the minimum and maximum values for each band (e.g. &91...
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by  Jason WolfeJump to last post
26 Oct 2020 02:43 PM
2 Replies and 47 Views ASTER 07XT Available Band List  47  2 Started by  sedat sedat I want to work with '07XT_ASTER L2 Surface Reflectance VNIR and Crosstalk Corrected SWIR V003' product. So recently i order and download ASTER scene ( AST_07XT_00305192005082601_20201001075438_21295.hdf and *.hdf.met files) for my project. I order this AST_07XT data level because i don't want to apply any atmospheric or cross talk correction to AST_L1T data set. But when i import the data to ENVI 5.3, band order and wavelengths are listed as below; ASTER VNIR Band1: 0.6610 ASTER VNIR Ban...
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by  sedat sedatJump to last post
21 Oct 2020 01:22 PM
3 Replies and 90 Views FeatureExtraction Workflow problem  90  3 Started by  Jennifer Swenson Hi, we discovered that after running the classification in the workflow, if you go back to alter your segments (or change attributes), the Next button is grayed out/non selectable. also classes cannot be saved at this point. So, you have to start from scratch. is there any way around this it seems going back and forth would be part of a 'workflow' and would improve the final classification. (ENVI 5.5.3).
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by  Jason WolfeJump to last post
08 Oct 2020 08:58 AM
1 Replies and 42 Views Capturing ENVI commands in IDL  42  1 Started by  David Hein-Griggs Hello, I am trying to help a Ph.D. student process ~80 satellite images. She has a series of steps -Combine 66 img files into one file with that many bands. -Aggregate to a lower resolution -Convert to geotiff -extract regions of interest (ROIs) She can do all this with ENVI manually, but it sure would be nice to automate to process. I have coded in IDL before (it's been a while, but I remember the basics). What I am hoping is that there's a way to see the underlying IDL command b...
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by  Jason WolfeJump to last post
01 Oct 2020 08:25 AM
2 Replies and 66 Views no data value dropped in layer stack  66  2 Started by  Morgan Bond I have a large Worldview 3 scene that is composed of a panchromatic image and a multispectral image. I am using ENVI modeler to create a layer stack of the pan, multispectral, and some veg indices (e.g. NDVI). I need the resulting stack to be in byte data format (0-255) At the start of my process the multispectral and pan band images have a no data value of 0. From the multispectral I create the indices I need, then perform a linear percent stretch raster. I also stretch the multispectral ban...
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by  Morgan BondJump to last post
23 Sep 2020 09:21 AM
1 Replies and 111 Views Stretch error with large raster  111  1 Started by  Morgan Bond I have a large raster (42212 x 232880, unsigned integer pansharpened WV-3 image strip, saved as an ENVI .dat file) that I would like to convert to byte data with a square root stretch. When I choose 'stretch data' and choose 'equalize' or 'square root', by percent, with output values from 0-255, I get an error: 'stretch_doit: An error has occurred during processing Error: 'attempt to subscript IN_HIST with LOC is out of range' The result may be invalid'. If I select ok, the process ends and...
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by  Jason WolfeJump to last post
28 Aug 2020 01:42 PM
6 Replies and 718 Views Projected raster envi 5.1  718  6 Started by  Diego Diaz Hi, can someone tell me how can i do something like (In Envi 4.7) Map--> Convert map projection in Envi 5.1 I guess that i must use the projected raster tool, but the problem is that i have a custom datum that i want to use. In Envi 4.7 i just add the datum to the datums text file, but in Envi 5.1 it doesn´t work. Actually what i want is to project from UTM WGS84 29 to ED1950 UTM 30, i should use the NTv2 grid to perform the transformation, i have found a folder in the exelis direct...
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by  ANINDITA MOHANTYJump to last post
26 Aug 2020 01:11 AM
3 Replies and 656 Views FLAASH Aerosol extraction from MOD02HKM  656  3 Started by  Firas Haddad Dear friends, I am trying to use FLAASH to extract the Aerosol Optical Depth (AOD) from MOD02HKM (MODIS L1B product) at 500 m resolution. When setting the parameters for the aerosol retrieval it runs well but there is no aerosol output file! Does FLAASH only correct the image for the aerosol without extracting a separate estimated aerosol layer Has anyone tried extracting aerosol from MOD02HKM using FLAASH Thanks,
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by  Samuel AkinnusiJump to last post
10 Aug 2020 11:13 AM
0 Replies and 94 Views Create Confusion Matrix with a classified SNAP image  94  0 Started by  Crismeire Isbaex Hi. I have an RF classified image on SNAP. However, SNAP does not have the confusion matrix calculation. In what format (file) does ENVI accept opening in the Matrix of confusion with truth Roi It is possible The message I get is that ENVI accepts only one image classified in ENVI. What steps do I have to take before the confusion matrix at ENVI Thank you for your help.
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10 Aug 2020 07:52 AM
2 Replies and 682 Views FLAASH Aerosol retrieval setting for LANDSAT7 and Landsat8  682  2 Started by  Rajesh Singh Dear users, In the Kaufman-Tanre Aerosol Retrieval tab, set the Maximum Upper Channel Reflectance and the Reflectance Ratio values. These settings identify dark pixels used for the visibility estimate. Recommended values are assigned automatically by choosing one of the options under the Defaults drop-down list. Here are some further tips for setting these values: Only define channels for the processing that is being requested. For example, if you are requesting an aerosol retrieval but not...
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by  Samuel AkinnusiJump to last post
09 Aug 2020 03:18 AM
0 Replies and 539 Views Single Class Models in Deep Learning 1.1  539  0 Started by  Brad Maguire Hello, I upgraded to ENVI 5.5.3/Deep Learning 1.1 from ENVI 5.5.2/Deep Learning 1.0 on June 7. I have been unable to reproduce results that I had achieved with DL 1.0 with DL 1.1. My single class results under DL 1.0 were very good but using the same* parameters as I did with the DL 1.0 model, I am unable to obtain a classification. The entire test area is now classified or unclassified. After a lot of trial and error, I obtained a single class result, but only by increasing the a...
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23 Jul 2020 06:03 PM
0 Replies and 156 Views Possible Explanation for Different Linear Spectral Unmixing Results?  156  0 Started by  Krista West Hello, I'm reaching out to ask if there is a known error or if anything has changed within ENVI 5.5.3 IDL 8.7.3 (64-bit) that would affect linear spectral unmixing (LSU) results between June 10, 2020 and July 15, 2020. Since June 10, I have been working with the same endmembers (12 single pixels saved as 12 separate ROIs for bare soil and vegetation types), the same two spectrally and spatially subset Landsat 8 images, and I always apply a unit sum constraint of 1.0.  For each run, I output...
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15 Jul 2020 06:41 PM
0 Replies and 152 Views SARAcape intensity workflow error  152  0 Started by  Jose Manuel Lattus Hello! I’m trying to perform the workflow of intensity in SARSCape and it have an error in the coregustration steps. I’m using sentinel 2 ... all scenes 2020 till July 5th. Could be a trouble with the orbital correction The message ir: FILE INCONSISTENCY (EC: 40001) COREGISTERED IMAGE (25/35) Thanks jmlattus
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12 Jul 2020 07:51 AM
3 Replies and 240 Views ENVI 5.3 - Crash on Startup  240  3 Started by  Charles Swanson ENVI 5.3.1 32- and 64=bit fails to launch, showing warning ' JSON_PARSE: Invalid string, no closing ''' ' before aborting. When ENVI is launched with IDL, IDL will open properly but ENVI never fully opens past the splash art, and doesn't display an error in this case. I have already tried both repairing and reinstalling the software, and rebooting the PC. This first became an issue on Wednesday, June 10th. PC specs: Processor: Intel(R) Xeon(R) Gold 5120 CPU 2.20GHz, 2195 Mhz, 14 Core...
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by  ANINDITA MOHANTYJump to last post
04 Jul 2020 05:18 AM
3 Replies and 11010 Views ENVI 5.4 Trial Version  11010  3 Started by  John scientist Dear Sir or Mam I want to know that, is there any trial version for envi 5.4 and idl 8.6 could you guide me please sincerely,
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by  Alba CadeteJump to last post
29 Jun 2020 09:18 AM
0 Replies and 181 Views ENVIImageIntersectionTask and ENVIBuildLayerStackTask  181  0 Started by  Marcos Montes First, I'm reading the manual page for ENVIImageIntersectionTask. There are a few options: one is RESAMPLING, and another is WARPING. Both are optional. My question is: when is warping performed Is it always performed Second, in ENVIBuildLayerStackTask, there is no ability to choose the intersection, as with the (old) ENVI Classic version. The only option here is RESAMPLING. It seems to me that the ENVIImageIntersectionTask may do (except for the actual stacking) something very simila...
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24 Jun 2020 01:23 PM
3 Replies and 294 Views Linear Spectral Unmixing & Unit Sum Constraints in ENVI 5.5.3 (64-bit)  294  3 Started by  Krista West Hello, I am hoping to obtain additional clarification regarding Linear Spectral Unmixing, particularly when setting a unit sum constraint of 1.0. I am working with Landsat 8 OLI surface reflectance data acquired over southern California within the past year, and my goal is to determine fractional cover values of three land cover types. Here are the steps I have followed: I imported my Landsat data and resized (subset) my scene to my area of interest. I kept all seven bands -- Coastal, Blue...
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by  Krista WestJump to last post
23 Jun 2020 06:17 PM
0 Replies and 152 Views Evapotranspiration mapping using ENVI  152  0 Started by  Umesh Acharya I am trying to do evapotranspiration mapping using ENVI. Does anyone have idea or is it possible in ENVI.
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23 Jun 2020 08:26 AM
2 Replies and 218 Views ENVI Modeler - Linear Spectral Unmixing  218  2 Started by  Krista West Hello, I am attempting to create an ENVI Modeler project so that I can eventually customize and automate parts of the Linear Spectral Unmixing process. I would like to begin by working with a single raster file and regions of interest that I have already created (to be used as endmembers), and then I hope to view the output in such a way that I can more easily analyze the fractional cover output values for certain pixels within the image. Is there an example I can follow to help me choose basi...
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by  Krista WestJump to last post
22 Jun 2020 03:07 PM
13 Replies and 52916 Views Free ENVI 5.3 download  52916  13 Started by  Vy Nguyen I've already created an account to download previous ENVI and IDL versions. But I got message that my access is denied due to verification pending process. So I have to wait up to 24 working hour and later on I can download previous version for free. Please reconfirm if I misunderstood any information! Thank you so much!
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by  Mari MinariJump to last post
26 May 2020 05:08 AM
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