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4 Replies and 1571 Views
FLAASH advanced parameters 1571 4
Started by Deleted User
Hi all,
I have a question about FLAASH parameters:
In "Advanced Settings" -> "For non-nadir Looking Instruments". I have MERIS images with sensor zenith angle of 30 degrees, but the zenith angle should between 90 and 180 degrees. Does anyone know how to convert it or just use the default one
Thanks,
Jie
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4 |
1571 |
30 Jun 2011 11:16 AM |
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1 Replies and 1602 Views
LiDAR to x,y,z 1602 1
Started by Deleted User
Hi,
I'm very inexperienced with ENVI and need to create a text file of three columns (x,y,z). I have LiDAR data exported from Arc in several formats including a text file, I'm not sure which one I need to use. I have watched someone do this in ENVI before but I didn't write down how they did it and I can't seem to figure it out. I know there is a function available to do this possibly in topography. The reason I need to the points is to create a mesh which I will do in different software....
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1 |
1602 |
29 Jun 2011 06:58 AM |
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0 Replies and 1526 Views
Open a NITF from using ENVI from the command line in windows 1526 0
Started by Deleted User
I need to be able to open a NITF file with ENVI from the windows command line.
I am still waiting for my account to be approved, so I cannot test this myself.
Do I need to do more than pass the file name as an argument to ENVI
Something like:
$ envi
If I need to do more, could someone please point me to the proper method or documentation.
Thank you.
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0 |
1526 |
28 Jun 2011 11:14 AM |
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1 Replies and 1837 Views
silent install necessary files / deploy ENVI 4.8 on Windows 7 1837 1
Started by Deleted User
Hello, I've read about the 'silent install' options for ENVI 4.7 and it mentions about the setupxx.exe file and the unattend.iss files. Are the equivalent of these files available for download on the ITTVIS website, where I got my current (4.8) ENVI installation files, available for 4.8 The tech tip mentions the 'Installation CD' so I'm wondering if it's only available on the CD on not when I download it from the ITTVIS website Also, does anyone have any ideas on how to de...
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1 |
1837 |
27 Jun 2011 02:01 PM |
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6 Replies and 1935 Views
Band math (none wavelength information) 1935 6
Started by Deleted User
Hi all,
I used band math to process the MERIS radiance image, but the output images had none wavelength information. Who knows how to keep the wavelength information with the input radiance image Thanks,
Jie
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6 |
1935 |
27 Jun 2011 01:51 PM |
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1 Replies and 1788 Views
ITT VIS Code Library for Hyperion 1788 1
Started by Deleted User
Is the ITT VIS Code Library for Hyperion different from the Destripe Function in ENVI
I used the ENVI Destripe function but it really did not destripe my hyperion data!
If the ITT VIS Code Library for Hyperion different from the ENVI Destripe function can someone
post the link for me. I checked at all the ITT VIS Code Library but couldn't find the tool.
Thanks.
A. Mah
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1 |
1788 |
27 Jun 2011 03:05 AM |
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2 Replies and 1330 Views
Mosaic_doit - subscript error? Please, help me..!! 1330 2
Started by Deleted User
Hello, All!
I am trying to mosaicking 4 MODIS tiles into one. I tried to use 'mosaic_doit' function.
I followed the guidelines, but I got stuck in this error message.
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ENVI Retrieve Data: An error has occurred during processing.
Error: "Attempt to subscript with is out of range." The result may be invaild.
I have no idea what this means. Is there anyone to help me Please give me any comments or suggestions.
This is what I have ...
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1330 |
25 Jun 2011 07:29 AM |
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0 Replies and 1560 Views
Atmospheric correction of MERIS with FLAASH 1560 0
Started by Deleted User
Dear all,
I tried to make the atmospheric correction with FLAASH but I had some problems with "input radiance image". I used SeaDAS to get the L2 product (calibrated TOA radiance) of MERIS, saved 14 bands of calibrated TOA radiance as ENVI standard format and converted it to BIL format. When I clicked "input radiance image" and selected the converted image, it said error: "READF: input conversion error. Unit 100, File: F:\image\stack_radiance_erie_bil" The re...
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1560 |
23 Jun 2011 10:10 AM |
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3 Replies and 1516 Views
Atmospheric correction of Landsat ETM SLC off images using QUAC 1516 3
Started by Deleted User
Dear Friends,
I tried to make the atmospheric correction using QUAC function in ENVI but i received only BAND1, BAND 2 and BAND 7 with corrected image but other BAND 3 and BAND 4, and BAND 5 are blank. Is it the normal problem or the special problem which i am only suffering.
Please suggest how could i get solve this problem.
Hari
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3 |
1516 |
23 Jun 2011 08:56 AM |
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5 Replies and 3131 Views
Running ENVI /IDL PRO scripts from Python 3131 5
Started by Deleted User
Greetings,
I wrote an IDL procedure which utilizes the MODIS Conversion Toolkit. The procedure works perfectly from an IDL command line. However, I have been unable to run it using Python. The procedure, which I named "modislstout.pro", uses three arguments for the input file path, input filename, and output directory. In Python I do the following:
>>> import envipy
>>> envipy.RunTool('modislstout','I:\\Data\\ET\\Files\\MODIS\\167','MOD11_L2.A2011167.0000.005.NRT.h...
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5 |
3131 |
22 Jun 2011 01:05 PM |
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1 Replies and 1528 Views
Running IDL scripts (that includes ENVI functions) silenty 1528 1
Started by Deleted User
I am running an idl script that includes the below line in a for loop (million times).
ENVI_DOIT, 'TOPO_DOIT', FID = fid, ELEVATION = elev, AZIMUTH = azim, $
BPTR = &912&93, DIMS = dims, POS = &910&93, R_FID = r_fid, $
PIXEL_SIZE = pixel_size, IN_MEMORY = 1
Above line calculates the shaded relief of a single pixel (only 1 line and 1 sample) at each time.
Whenever I run this comment, idl pops-up a ...
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1 |
1528 |
22 Jun 2011 11:57 AM |
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4 Replies and 2019 Views
Band math error 2019 4
Started by Deleted User
Dear All,
I am trying to convert an integer file to floating point using the band math equation "float(b1)/1000"
However when I try to apply this to the whole file I get the following error:
"new_math_doit: And error has occurred during processing
Error: Attempt to subscript STR with PTR is out of range
The result may be invalid"
The file is invalid and ENVI crashes out.
I have searched for this error but cannot find out what it refers to. Ini...
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4 |
2019 |
22 Jun 2011 03:19 AM |
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6 Replies and 2111 Views
MODIS NDVI, EVI Time Series Analysis 2111 6
Started by Deleted User
Dear Users,
I am working on multi-temporal MODIS NDVI and EVI products, I am looking for a code in ENVI/IDL..If any of you have such code, kindly share the same.
Thanks,
Giriraj
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6 |
2111 |
21 Jun 2011 01:56 AM |
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0 Replies and 1725 Views
De-shadow of Worldview-2 1725 0
Started by Deleted User
have any of the users on here done any de-shadowing work on Worldview-2 images and created and IDL program to remove it or mask it.
i have shadows from cliffs that i would like to remove or mask
thanks in advance
Rod
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0 |
1725 |
20 Jun 2011 03:05 PM |
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0 Replies and 1495 Views
NDWI for WorldView-2 1495 0
Started by Deleted User
i have done a NDWI of Worldview-2 however however when i do any bare rocks near water are left blank like the water.
i was just wondering if any of you users have any experience with limiting this with WorldView-2 data.
to give you an idea of my data i have an image of islands with a lot of sea and would like to mask out land or sea so i can do classification on them separately
thanks in advance
Rod
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0 |
1495 |
20 Jun 2011 03:02 PM |
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1 Replies and 1842 Views
Changing the default interleave from BSQ to BIL 1842 1
Started by Deleted User
Hi All,
Is there a way to change the default image output interleave (from processes such as cross-track correction, band math, etc.) from BSQ to BIL
I have a large number of pretty sizable hyperspectral images i need to process, so cutting down the amount of processing time would be grand. I'm using Envi 4.7 (32-bit windows).
Thanks in advance!
Matt
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1 |
1842 |
19 Jun 2011 03:33 PM |
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0 Replies and 1132 Views
Generate Reflectance of Hyperion using FLAASH 1132 0
Started by Deleted User
I'm trying to generate reflectance of Hyperion (242 tiffs) using FLAASH and getting error message (ACC error: avrd: No nonblank pixels found; IDL error: CDIVER4V3Rs: >>> Wait for MODTRAN4 calculation to finish...) Any suggestion
Steps I've taken
1. No data / bad bands (1-7) (58-78) (167-178)(225-242) are not used/omitted
2. Bands 8 - 57 layer stacked and b1/40 (band math) applied to get radiance (VNIR)
3. Bands (79-166), (179-224) layer stacked and b2/80 (band math) applied to get radianc...
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0 |
1132 |
18 Jun 2011 01:41 AM |
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1 Replies and 2129 Views
ENVI DEM Problem 2129 1
Started by Deleted User
I was creating DEM and got Warning Message:
TRIANGULATE: Not enough valid and unique points specified. Please consult the supplier of the application.
I am using 3N and 3B from ASTER Image. Used GCP from Topo maps, lat/long and elevation information, but at last moment I get the message.
Tried with collecting just 3-5 GCP's as well as more.
If anyone has suggestion on this problem or more detailed tutorial, please let me know.
Thanks
Kabindra
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1 |
2129 |
17 Jun 2011 08:44 AM |
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5 Replies and 1740 Views
calculating NDVI using band 4 in the NIR 1740 5
Started by Deleted User
Please I am trying to calculate ndvi on landsat TM images using band 3 (red) and 4 (NIR) but no image is being displayed. But is I susbtitute 1 for 4 it does work. Please what is the problem, why cant I use 4
Thanks
Devolent
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5 |
1740 |
16 Jun 2011 05:32 PM |
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2 Replies and 1464 Views
ISODATA initial cluster seeding 1464 2
Started by Deleted User
I have a question about how initial cluster seeding is performed by the ISODATA algorithm as implemented in ENVI. The only description I've been able to find is that it "calculates class means evenly distributed in the data space." Does anyone know how many cluster centres are calculated during the initial seeding As in, if 5 is the minimum number of classes specified by the user, does the algorithm calculate five initial cluster centroids that are evenly distributed throughout the da...
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2 |
1464 |
11 Jun 2011 02:06 PM |