X
Search this forum:
Search
You are not authorized to create a new topic
Page 10 of 137 << < 89101112 > >>
Topics
 Replies
 Views
 Last Post
10 Replies and 2152 Views Color Slice Classification ENVItask  2152  10 Started by  Deleted User Hello! I am trying to apply a color table to a geo-referenced single band image so I can export it as a GeoTIFF with the original pixel values intact using an ENVI task or ENVI API. So far, I have been able to stretch the image (in IDL using ENVITask 'linearpercentstretchraster') with a 2 linear stretch, but the data ignore value (-9999) is changed to 241. When I display the stretched raster in ENVI, even though the metadata says -9999 is the data ignore value, ENVI still ignores the pix...
10 2152
by  MariMJump to last post
19 Nov 2018 02:20 PM
1 Replies and 1502 Views ENVI Modeler  1502  1 Started by  Deleted User Hi, I have been looking at the ENVI Modeler to create simple batch programs. What I would like to do is write out the means for each band in a raster subset. The documentation on ENVI model has a tip that suggests the basic node, 'Output Parameters', would work. I tried it (several different ways), and I can't get the output means even printed on the screen. The list of tasks in the modeler does not include a 'Print' task. It would be icing on the cake if I could write the output of each rast...
1 1502
by  MariMJump to last post
19 Nov 2018 09:17 AM
1 Replies and 1419 Views ENVI crashes on startup for Mac OS  1419  1 Started by  Deleted User Hi all! So I just installed ENVI 52 IDL84 on one of our laboratory's new computers. I copied a license file from one of our computers and it got IDL running. Now the problem. Everytime I try to run any of the 'ENVI' apps, then xterm/xquartz loads and then briefly shows a terminal showing the licensing information before closing. Nothing happens. Below are details about my system and license: System: OS: Mac OS High Sierra Version 10.13.6 software version: ENVI 52 and IDL84 XQuartz ...
1 1419
by  MariMJump to last post
19 Nov 2018 08:31 AM
6 Replies and 1944 Views Statistics Calculations  1944  6 Started by  Deleted User I have calculated the statistics for an image raster (that has been masked, and contains NaN values) using the ENVI calculate statistics GUI, and the ENVIRasterStatisticsTask. These two options give me the exact same eigenvectors and eigenvalues for my raster. However, I am using these statistics for a PCA rotation. When I use the ENVI Forward Rotation with New Statistics GUI tool, the resulting eigenvectors and eigenvalues are NOT the same as calculated with the statistics only tools. This ...
6 1944
by  Deleted UserJump to last post
13 Nov 2018 01:40 PM
1 Replies and 2347 Views Resize Data with ENVI Basic Tools  2347  1 Started by  Deleted User Hello, I have been trying to extract single bands from a 12 GB multi-band Sentinel-2 mosaic but it always give me some errors: First error: Read error at row 6144 column got 0 bytes then when I click OK it gives me another error WRITEU: Error encountered writing to file. Unit 104. The result may be invalid. Any help would be greatly appreciated. Thank you.
1 2347
by  MariMJump to last post
08 Nov 2018 10:05 AM
14 Replies and 3041 Views ENVI API GLTreproject  3041  14 Started by  Deleted User Hello! I am trying to open and then re-project Sentinel 3 data using the ENVI API commands in IDL. The reprojectGLT ENVITask requires raster bands with the lat/lon values, but this is not how the Sentinel-3 data is opened in IDL. How do I do this The GUI in ENVI works beautifully, but I am hoping to streamline the processing. Thanks so much, Dulci
14 3041
by  MariMJump to last post
06 Nov 2018 12:18 PM
1 Replies and 2686 Views ENVIROIMASKRASTER: Mask ROI does not contain any valid pixels for input raster  2686  1 Started by  Deleted User I am trying to do a simple masking of an AVIRIS scene using a single polygon shapefile that indicates my study extent. I've converted the shapefile into an ROI using the vector to ROI tool. I've been getting the 'ENVIROMASKRASTER: Mask ROI does not contain any valid pixels for input raster' error. I can clearly see that the shapefile overlaps with the image and that they both have the same projection. Also, I have attempted the same procedure using the shapefile/vector directly and that resulted...
1 2686
by  MariMJump to last post
31 Oct 2018 08:36 AM
4 Replies and 1657 Views KazEOSat-1/2 sattelites support  1657  4 Started by  Deleted User Dear Mr. or Ms. We have a several stereo scenes of KazEOSat-1/2 satellies (https://directory.eoportal.org/web/eoportal/satellite-missions/k/kazeosat-1) We should to make a processing 1. Create DEM 2. Orthoresampling We tried to find the KazEOSat satellite sensor model among the supported satellites but we couldn't do it Do ENVI support KazEOSat satellite sensor model and we have a photogrammetric processing of data regards
4 1657
by  Deleted UserJump to last post
30 Oct 2018 09:16 AM
2 Replies and 2367 Views Help need for Local spatial statistics Moran's I and Geary's C  2367  2 Started by  Deleted User I need come clarification regarding the Local Spatial Statistics tools(Getis-Ord G, Gearys C and Moran's I) From the literature ENVI cited(And from other sources) I found that "Moran’s I varies from -1 (negative autocorrelation) to 1 (positive autocorrelation). Geary’s c ranges from 0 (Positive Autpcorrelation) 1 (no auto correlation) and 2 (negative spatial autocorrelation)." However ENVI 4.5 is not obeying this rule, when I ran these methods on a raster file ...
2 2367
by  MariMJump to last post
29 Oct 2018 12:08 PM
0 Replies and 21761 Views Digital elevations models editing  21761  0 Started by  Deleted User Dear Mr or Ms we have a DEM file and stere pair of satellite images But DEM file have a lot of 'noise' and we want to edit/filter it. Also we should make DTM file file from DEM. We have a special stereo monitor supports the passive polarization stereo mode (Planar) 1. Does ENVI support the editing of DEM file in stereo mode 2. Can I overlay the DEM file over the stereopair 3. Can I visualize and edit DEM file as TIN regards
0 21761
29 Oct 2018 10:06 AM
1 Replies and 1477 Views Forest Health Tool add parameters  1477  1 Started by  Deleted User To account for the Forest Health, I need to take into account 5 parameters, however, since the code is not public I can not make any changes or add the parameters myself. Please let me know a way around it. If the equation is available then it will be great and I can myself work my way around it by coding it myself.
1 1477
by  MariMJump to last post
28 Oct 2018 03:45 PM
3 Replies and 2167 Views orthorectification error - image DEM not overlap  2167  3 Started by  Deleted User Hello, I'm trying to orthorectify a QB image, using a DEM. Both images cover roughly the same area, with the DEM having a slightly larger extent than the QB image. I can link the viewers or geographically link them and the areas correspond (see link here: https://dl.dropbox.com/u/42285242/_ENVI_orthorectification_overlap_issues.jpg). The DSM on the right side is just there for reference and corresponds to the DEM 1:1. However when I try the orthorectification (Map-Orthorectification-Quickbird-...
3 2167
by  Deleted UserJump to last post
11 Oct 2018 09:30 AM
6 Replies and 2331 Views spot orthorectification  2331  6 Started by  Deleted User Has anyone orthorectified Spot images with 2A pre-processing These images don't appear to come with RPCs so not sure if I can use the ENVI orthorectification tool. Thanks!
6 2331
by  MariMJump to last post
08 Oct 2018 08:33 AM
1 Replies and 21503 Views Spectral Hourglass wizard crashed halfway-- how to resume?  21503  1 Started by  Deleted User I am using Spectral Hourglass wizard to identify endmembers in AVIRIS data. However, it crashed after the n-Dimensional viewer. I have all the files saved from the previous steps, so how do I resume progress in the wizard at the n-Dimensional Viewer without having to go through all the previous steps Related question: Since I could not figure out how to resume the wizard, I've been trying to reconstruct the wizard workflow manually. However, I can't find the ENVI tool for spectral coherence...
1 21503
by  MariMJump to last post
24 Sep 2018 08:24 AM
1 Replies and 2205 Views Confusion Matrix with ROIs  2205  1 Started by  Deleted User Hi Everyone, I have several ROIs that represent different objects on the ground and in every ROI I have same number of pixels. But when I generate the confusion matrix, the Envi multiply the number of pixels in each ROI by 4. For instance, if I have a ground truth ROI that represent water and comprised of 10 pixels, I will see the 'water' class in confusion matrix with total number of 40. I have tried many times and each time, Envi multiply it by 4 ( even when you have only 1 pixel in the ROI,...
1 2205
by  MariMJump to last post
10 Sep 2018 02:20 PM
1 Replies and 21100 Views Apply SAM classified pixels to larger scene  21100  1 Started by  Deleted User I used Spectral Angle Mapper to pull out pixels of interest to me, which creates a binary image, where those pixels with value 1 are pixels of interest. Specifically, I applied SAM to locate pixels which represent only sunlit vine leaves in a vineyard scene. How can I now use the SAM classified image to pull out only the vine pixels (with associated 272 bands) from the larger vineyard scene I would like to only operate on those pixels which I pull out as vine pixels and not all pixels in the vi...
1 21100
by  MariMJump to last post
10 Sep 2018 01:38 PM
4 Replies and 3165 Views Sentinel 3 OLCI water product flags  3165  4 Started by  Deleted User Hello! Is there a way to read in the pixel quality flags for the Sentinel 3A water reflectance product. The flags are in a separate .nc file in the product, but I have not been able to load them into ENVI to create specific masks for land, or clouds. What am I missing Thank you! -dulci
4 3165
by  MariMJump to last post
31 Aug 2018 09:13 AM
5 Replies and 6324 Views Landsat 8 surface reflectance _MTL.txt file note recognized  6324  5 Started by  Deleted User Hello! I am using ENVI 5.4.1 & the open_as function to import Landsat 8 OLI Surface Reflectance files in GeoTIFF format with an _MTL.txt is not reading in the data. I know that there has been some support for that format, but the program is not recognizing the MTL.txt files as valid. Importing the GeoTIFFs and creating a metafile has created a host of problems because the data periodically is moved around on our computer, so while we have used this work-around for a couple of years, it is not...
5 6324
by  Deleted UserJump to last post
30 Aug 2018 03:08 PM
2 Replies and 2314 Views Editing metadata in ENVI 5.3  2314  2 Started by  Deleted User This is an old question that was asked in a different thread, but the original question was not phrased very clearly so I am re-starting it here. The question is this: when I try to edit the ENVI metadata file in ENVI 5.3 to add a 'data ignore' value, the metadata window disappears, and the ENVI .dat file also disappears from the file manager. We need to be able to edit the metadata to include both an ignore value and also to import georeferencing from another file. But when the .dat file is...
2 2314
by  Deleted UserJump to last post
30 Aug 2018 03:04 PM
0 Replies and 2679 Views Subtracting ROIs  2679  0 Started by  Deleted User Hi Every one, I have a Large ROI and I am generating a random sample out of that. Then I want to subtract the new generated one from the big original one to create another ROI. Is there any suggestion on how to do that Thanks.
0 2679
24 Aug 2018 02:35 PM
You are not authorized to create a new topic
Page 10 of 137 << < 89101112 > >>