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1 Replies and 4142 Views Import Ascii ROI file  4142  1 Started by  Deleted User I have an ROI file in ascii format, exported by ENVI. How can I import this back into envi
1 4142
14 Mar 2017 03:39 AM
8 Replies and 23295 Views Mosaic Landsat 7  23295  8 Started by  Deleted User Hi, I have 11 'Landsat 7 ETMSLC on' tiles which overlap each other. I want to make them into a mosaic. Firstly, if I want to pre-process the cloud cover to reduce it what is the best way to do this, and should I do it individually to each image before or after the mosaic (I have not done a radiometric and atmospheric correction yet - I am not sure if this is necessary). As a test I have used the 'Seamless Mosaic' tool for my images and it has created white vertical gaps between images within t...
8 23295
09 Mar 2017 03:44 AM
1 Replies and 2470 Views ClassificationToVector tool  2470  1 Started by  Deleted User Hi all, I need to convert a classification output to a vector file using envi api. First of all, I am studying the workflow using ENVI: Select the ClassificationToVector post classification tool Choose the class layer and the class value to convert into shapefile Save as myshape.evf Select the Classic EVF to Shapefile tool Choose as input tje myshape.evf and save as myshape.shp The shapefile, created with the workflows above, has the following properties: n polygons, ...
1 2470
06 Mar 2017 10:58 AM
1 Replies and 2706 Views How mask a SVM classification output  2706  1 Started by  Deleted User Which is the best way to apply a mask raster to an SVM classification I am using the SVM classification task, ENVI API. The reason for this question lies in the fact that the task does not take a mask layer as paramater. Thank you for any suggestion.
1 2706
03 Mar 2017 05:22 AM
3 Replies and 2407 Views ENVIMaskRaster does not work  2407  3 Started by  Deleted User I need to create and then apply a raster mask. Here my code: File = Filepath(inputfile, Root_Dir = root_path) raster = e.OpenRaster(File) cloudmask = (raster.GetData(BAND=0) ge 0.2 and raster.GetData(BAND=1) le 285) output = Filepath(output_file, Root_Dir = output_path) maskRaster = ENVIRaster(cloudmask, URI=output) maskRaster.Save rasterWithMask = ENVIMaskRaster(raster, MaskRaster, /INVERSE) rasterWithMask.Export, masked_raster, "TIFF" The maskRaster is created correctly and is di...
3 2407
01 Mar 2017 08:04 AM
5 Replies and 2545 Views FLAASH error with MASTER data  2545  5 Started by  Deleted User Hi, I'm trying to process MASTER multispectral data using FLAASH. I'm using the unknown multispectral sensor type and have a system response function file. I'm only trying to process the swir bands. The image came in calibrated radiance. When I run FLAASH on ENVI 5.2 I get the following error: Problem: The FLAASH program exited with the following errors: ACC error: modrd5: Nonfinite numbers in coefficient array coed. IDL error: ACC_MODRD5 ACC_KTAEROSOL ACC_HYPER2 ACC_...
5 2545
27 Feb 2017 05:18 PM
3 Replies and 2837 Views SPEAR Vertical Stripe Removal  2837  3 Started by  Deleted User Hello! I have hyperspectral images from an airborne sensor that I des-stripe using the SPEAR vertical stripe removal tool. For these images it is most effective when there are no pixels included in the mask, so I set those parameters to 0 on the bottom and 100 at the top of the range. However, with some of my images, not all, I end up with bands that have no data - i.e. all pixels are NaN for those bands, even when the original raster has valid data in the same bands. What is happening he...
3 2837
27 Feb 2017 09:03 AM
4 Replies and 3416 Views dem question "RpcOrtho failed: Action failed"  3416  4 Started by  Deleted User I get the error message "RpcOrtho failed: Action failed" when I try to use a particular dem in the RPC Orthorectification Workflow. When I use the default dem or aster, it runs without error. If there some certain format the dem needs to be in How can I find out more about this error, so I can track down the problem The dem has this mapinfo- map info = {Geographic Lat/Lon, 1.0000, 1.0000, -149.93536332, -17.45823938, 5.6593862900e-06, 5.6070907577e-06, WGS-84, units=Degrees}coord...
4 3416
24 Feb 2017 12:16 PM
2 Replies and 2475 Views Is there bug in ASCII Grid expot?  2475  2 Started by  Deleted User I've got geotiff 20x30 pixels (obtained from ENVI "save as") for which ENVI generated the world file tfw: 0.5 0 0 -0.5 20.25 49.75 So 49.75 is the uper left pixel center value (i.e. according to https://en.wikipedia.org/wiki/World_file) the tiff file has also geotags (dumped with exiftool): Pixel Scale : 0.5 0.5 0 Model Tie Point : 0 0 0 20 50 0 Geo Tiff Version : 1.1.0 GT Model Type : Geographic GT Raster Type : Pixel Is Area Geographic Type : WGS 84 Geog Line...
2 2475
23 Feb 2017 03:36 PM
1 Replies and 2853 Views WV-3 data processing  2853  1 Started by  Deleted User Hi everyone, I have a SWIR bundles of standard 2A view ready product, worldview-3 data. I have applied radiometric calibration followed by FLAASH to get surface reflectance (using ENVI 5.3). Can anybody assure me whether my methodology is correct or something else I need to do Thanks in advance Pankajini
1 2853
22 Feb 2017 03:22 AM
1 Replies and 3911 Views empirical line calibration  3911  1 Started by  Deleted User Good afternoon, I have a coupleof questions regarding the Empirical Line Calibration tool in ENVI 5.3. I amusing the Empirical Line Compute Factors and Correct tool. Throughout thedialog that being once you run this tool, there are several different optionsthat I do not understand, nor could I find in Help articles online, perhaps Iam just looking in the wrong places but I wanted to ask anyways. Firstly, somebackground on the dataset that I am using. It is an RGBdata set collected from a consum...
1 3911
13 Feb 2017 02:55 PM
1 Replies and 3316 Views Access to forum with the new portal credential  3316  1 Started by  Deleted User Hi all, currently I connect and send post in this forum by using email and password to a colleague who no longer works at my company. When I updated the version to ENVI 5.4 I got a new user-id and a new password that allow me access only to the new Harris Download and License Center portal. Can I unify the login credentials, or upgrade to the new credentials In fact the email that you can see is not mine. Thank you
1 3316
09 Feb 2017 10:00 AM
4 Replies and 2908 Views FLAASH end-of-input-record error  2908  4 Started by  Deleted User I'm trying to convert a radiance image to reflectance and receive an error from FLAASH shortly after it starts processing. This linked image is the error dialog I get (for some reason, the editor won't let me embed the image): flaash_error_dialog In case the link does not work, here is the error dialog text: ACC error: convert7 IDL error: End of input record encountered on file unit: 0. ACC_CONVERT7 ACC_HYPER2 ACC_ACC_EVENT ENVI_FLAASH_PROCESS_MANAGER $MAIN$ And here is a l...
4 2908
07 Feb 2017 05:44 PM
4 Replies and 2883 Views Hyperion L1Gst, Zigzag spectral profile after Radiometric Calibration  2883  4 Started by  Deleted User Hyperion L1Gst geotiff file showing Zigzag spectral profile in optical and NIR range after Radiometric Calibration. Though before calibration the profile shows normal curve. how to correct it
4 2883
07 Feb 2017 01:03 AM
2 Replies and 2658 Views Thematic Change workflow into ENVI API  2658  2 Started by  Deleted User Hi all, i am trying to built an ENVI API workflow to reproduce the Thematic Change workflow available in the ENVI's Change Detection toolbox. Using the Thematic Change toolbox i can set a kernel filter and an Aggregation parameter (how well explained in the tutorial at this link http://www.harrisgeospatial.com/docs/ThematicChangeTutorial.html). I can also save a statistics.txt file, an image file and a vector file. I am trying to reproduce the same workflow using ENVI API functions and methods,...
2 2658
02 Feb 2017 07:38 AM
1 Replies and 2262 Views Wrong values VIs  2262  1 Started by  Deleted User Hello i'm having trouble using the Vegetation Index Calculator, when i use it the min value i get for almost alla index is betwen -9999.000...(min), and the max value 1.000... i'm not sure where is the problem, can anyone hel, thanks. I have read that the values must be betwen -1 and 1.
1 2262
31 Jan 2017 06:04 PM
2 Replies and 2288 Views help for the triangulation interpolation method in landsat_gapfill.sav  2288  2 Started by  Deleted User Hello everybody, I am new in the forum so let present myself. I am a teacher in one university of China. I do research on methods to fill the data gaps in the ETM imagery. I have try to fill the data gaps in the ETM imagery using landsat_gapfill.sav IDL programming. I want to know the details of the triangulation interpolation method in landsat_gapfill.sav. Anyone could give me some literatures of the triangulation interpolation method in landsat_gapfill.sav. Thank you!
2 2288
28 Jan 2017 06:02 AM
0 Replies and 2423 Views the algorithm of landsat_gapfill  2423  0 Started by  Deleted User I'm doing some research on gap-fill algorithm to recover gapping of landsat 7 SLC-off data. Anyone can give me details of the triangulation interpolation method in the landsat_gapfill.sav thanks.
0 2423
27 Jan 2017 04:48 PM
1 Replies and 2446 Views NDVI calculation  2446  1 Started by  Deleted User Hello everybody, I am new in the forum so let present myself. I am an Engineering student and I am learning the bases of remote sensing. I use Envi 4.7 and in my project I calculated the NDVI values variations of an area between two periods of time using the Band Math. Now the problem is: I need to keep fixed the values of NDVI for some pixels of the second image, while the other pixel have to change their NDVI value according to a proportion. I mean, suppose the pixels that I want to keep fixed...
1 2446
24 Jan 2017 01:11 PM
1 Replies and 1962 Views tech. support form cant function properly  1962  1 Started by  Deleted User I have been trying to submit a ticket to request ENVI 5.2 Linux installation files with tech. support form for three days. The license number field is BROKEN, so I cannot fill in our license properly and then the system keeps asking me to fill in the lic. no..... Please help.
1 1962
23 Jan 2017 02:10 PM
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