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0 Replies and 1561 Views
Running an IDL script from ENVI GUI 1561 0
Started by Deleted User
Hi all,
I have an IDL script which uses ENVI routines. I want to be able to run the IDL script on two or three machines but due to license limitations, i'm able to use only one IDL license at a time. However, we do have more than 5 ENVI licenses which means i can use ENVI on multiple machines. This brings me to my question.
Since ENVI is completely written in IDL, can i open the ENVI GUI and run an IDL script from ENVI without having to use IDL We have ENVIIDL license. Just like how a Python...
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1561 |
16 Jan 2009 03:26 PM |
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1 Replies and 1003 Views
extracting desert vegetation from a quickbird image--will this work? 1003 1
Started by Deleted User
Hi--
I have a thought (still new to this), and wanted it to run it by the experts--please let me know if I'm going about this correctly!
I'm doing some archaeology in the desert, and trying to study erosional processes, etc.&160; I have some quickbird imagery--2.5m multispectral and .6m panchromatic.&160; Individual desert shrubs can be picked out on the panchromatic imagery, just generally inferred on the ms.&160;
What I want to do is create a raster showing vegetation density, but someti...
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1 |
1003 |
15 Jan 2009 09:24 AM |
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1 Replies and 1295 Views
Creating a big 2D array in ENVI batch mode 1295 1
Started by Deleted User
I asked the same question ITTVIS technical support but this topic might be interesting for the whole community as well.
I use a quite big 2d array (15000*20000) in batch mode routine that suppose to use ENVIs libraries (ENVI_DOIT).
ns=15000
nl=20000
D = make_array(ns,nl, /double)
and then even before any processing step I get following message:
Unable to allocate memory: to make array.
Not enough space
So the question is that - did I reach some array's limitations and...
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1 |
1295 |
14 Jan 2009 08:38 AM |
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2 Replies and 1624 Views
Problems georefencing 1624 2
Started by Deleted User
Hello all
&160;
My question for today is the following.
&160;
I am georeferencing Spot images from an hidrography and a road layer. I just want to improve the match since this images are already georeferenced. I am trying the RST and Polynomial degree=1 methods, and the Nearest neighbor and the Bilinear interpolation for the intensity interpolation. When comparing the new images I found that the georefence was different between the nearest nighbor and the Bilinear interpolated images. I wa...
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1624 |
14 Jan 2009 04:21 AM |
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1 Replies and 1172 Views
Problem with SOPT4 atmospheric correction using FLAASH 1172 1
Started by Deleted User
I've been trying an atmospheric correction for SPOT4 data using FLAASH. The problem is it required ASCII file containing wavelength of SPOT. I created text file having one colume containing wavelength of SPOT4 (band center). I showed up an error messgae. Anyone here know how to solve this please help me
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1 |
1172 |
13 Jan 2009 09:50 PM |
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3 Replies and 1176 Views
Aster File format 1176 3
Started by Deleted User
We have recently purchased from USGS through a local reseller a couple of ASTER images Level 1A collected in 2008.
These images were delivered as zip files containing, per band, files as below :
AST_L1A_00305012008092831_20081219160421_4187.VNIR_Supplement.txt
AST_L1A_00305012008092831_20081219160421_4187.TIR_Supplement_Temp.txt
AST_L1A_00305012008092831_20081219160421_4187.TIR_Supplement_Encoder.txt
AST_L1A_00305012008092831_20081219160421_4187.TIR_Supplement_Chopper.txt
AST_L1A_0...
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3 |
1176 |
13 Jan 2009 09:21 AM |
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5 Replies and 1363 Views
Georeferencing in mountain area 1363 5
Started by Deleted User
Dear All
&160;
I would like some feedback in how best georeference images from very mountanous areas. I am working with SPOT and Landsat images and I am doing and Image-to-map registration, so they fit better the maps I am using for analysis.
Can any body give me suggestions regarding the method (RST, polynomial etc) and the resampling procedures
&160;
Thank you
Shaenandhoa Garc&237;a Rangel
PhD candidate
Wildlife Research Group
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5 |
1363 |
12 Jan 2009 10:02 AM |
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1 Replies and 1402 Views
RMSE 1402 1
Started by Deleted User
Hello just a quick question:
&160;
In which units is the RMSE for Image-To-Map registration Is it on pixel units
Cheers!
&160;
&160;
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1 |
1402 |
12 Jan 2009 04:48 AM |
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0 Replies and 1239 Views
two questions 1239 0
Started by Deleted User
Hi--
First of all, wondering how to create an albedo image from Quickbird Imagery&160; I believe it's the square root of the sum of squares of all bands, but I thought this was supposed to be a value between 0 and 1&160; Thanks
Also, I've been reading up on how to remove shade/shadow from images using endmembers--but as I'm a novice to all this I find it fairly confusing.&160; I'm starting to grasp it theoretically, but could I get some advice as to how do manage this in ENVI
Thanks!
S...
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1239 |
10 Jan 2009 01:04 PM |
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1 Replies and 1358 Views
FLAASH with Quickbird 1358 1
Started by Deleted User
I am trying to use FLAASH with Quickbird imagery and have managed to get the final output image which is in scaled reflectance.&160; What do I need to do to get an image to show the reflectance in the 0-1 range&160; Right now all of my pixels are showing reflectances in the thousands and hundreds.&160; Thanks.
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1 |
1358 |
07 Jan 2009 10:15 AM |
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1 Replies and 1329 Views
ENVI programming - display window 1329 1
Started by Deleted User
I am new to ENVI programming and am trying to run a program from the display window. For example, if I wanted to stretch an image, how would I indicate that I wanted the image that is opened in the current display window. I have been successful in adding the program to the display menu bar.
Thanks!
Christina
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1 |
1329 |
05 Jan 2009 02:48 PM |
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1 Replies and 1311 Views
Regarding removal of Bad lines from Hyperion data 1311 1
Started by Deleted User
How can I remove the bad lines from my Hyperion data which is in L1T/G fromat(Terrain and geometric corrected)
When i am trying this in ENVI it asks for no. of detectors. What is the no. of detectors to be given so that I get bad lines removed data . Is there any other software which can help me.
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1 |
1311 |
04 Jan 2009 11:48 PM |
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7 Replies and 1422 Views
Landsat mosaic 1422 7
Started by Deleted User
Hi,
I am pretty new to ENVI. I am trying to make a mosaic of three georeferenced Landsat images (NW,SW,NE of my study area). I have managed to make the NW and NE seamless but the SW image does not show up when I set the X0 Y0. Any suggestion Thanks. Maria
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1422 |
04 Jan 2009 08:00 PM |
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3 Replies and 1394 Views
problem in MODIS.sli 1394 3
Started by Deleted User
Merry Christmas.
A problem in MODIS.sli of ENVI 4.3 and 4.5.
I want to get the&160;&160; Center wavelength of MODIS 36 bands, and I used modis.sli file to calculate.
there exists little error in modis.sli. the value of band1 and band2 is reversed in envi 4.3.
seems also made mistakes in&160; band 27 and band28 .
in literatures about MODIS, band 27 wavelength is between 6.535 - 6.895 micrometer,
while band 28 wavelength&160; is between 7.175 and&160; 7.475 microm...
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3 |
1394 |
28 Dec 2008 06:29 AM |
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1 Replies and 1339 Views
ENVI Feature Extraction Vector always with pixel-based projection 1339 1
Started by Deleted User
Hi all,
I'm currently using the ENVI Zoom Feature Extraction module with SPOT5 images. The images have&160;a projection and fall into the right location within ArcGIS.
I went trough the process of segmenting and merging the images until&160;the point where I have to decide, => classify or export the created vector file.
I choose, export - give&160;the shapefile a name and include attribute data....
Now, the vector file doens't get any projection and is pixel based, which means I can't add...
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1 |
1339 |
22 Dec 2008 10:39 PM |
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5 Replies and 1501 Views
a question about CLASS_MAJORITY_DOIT 1501 5
Started by Deleted User
Hi, everybody.
I&160;try to complete a project of Post Classification with CLASS_MAJORITY_DOIT, whose&160;UI looks like Envi.
By reading the help,&160;I can't find the tips or keywords how to pass the value of Center Pixel Weight.
Who can offer a solution&160; &160;I&160; need your help!
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5 |
1501 |
14 Dec 2008 12:17 AM |
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1 Replies and 1897 Views
convert_modis_data 1897 1
Started by Deleted User
Hi all,
I just downloaded the modis conversion toolkit.zip file from the code library in order to GUI/ programmatically georeference MODIS images. The zip file does not seem to contain the convert_modis_data.sav file which is required for the batch processing routine in IDL. The zip file only contains the user guide and the modis_conversion_toolkit.sav file which goes into the ENVI/ save_add directory. Am i missing something here The convert_modis_data.sav file is supposed to be placed in the ...
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1 |
1897 |
12 Dec 2008 01:30 PM |
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1 Replies and 1171 Views
classification problem:):) 1171 1
Started by Deleted User
hello:) Iam a new envi user and i am trying to use svms for my classification project. The problem is how can i use training sets from different cubes..
short version: extract some classes from cube1, extract some classes from cube2, use all classes for classifing cube2 with svm
long version: i use roi tool to determine small regions from cube1 and then save it . Then i do the the same forcube2. When i restore both rois, envi restores all the regions from&160; the current cube (cube2) and not...
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1 |
1171 |
06 Dec 2008 04:44 AM |
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2 Replies and 1438 Views
Basic Statistics 1438 2
Started by Deleted User
Hello everyone.
&160;
I am new to ENVI and so I am trying to find my way around and so far so good. However, I have a question regarding the output of the Basic Tools/Computing statistics module. I have asked the program to calculate the Covariance and so in the output it shows the covariance and the correlation matrix, the eigenvalues and the eigenvectors.
So far I haven't been able to find out how were the correlation coeficients calculated. Meaning what statistic was used.
I addition I a...
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2 |
1438 |
03 Dec 2008 11:29 AM |
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0 Replies and 1701 Views
help , calculate solar zenith, solar azimuth, sensor zenith, sensor azimuth 1701 0
Started by Deleted User
I download some data of MSG-2 from eumetsat,
but there are no solar zenith, solar azimuth, sensor zenith, sensor azimuth in these data.
I don't know how to calculate these angles.
The position of MSG-2 is (0E,0N)
&160;
Thank you for everyone's reply
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1701 |
03 Dec 2008 06:33 AM |