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0 Replies and 1546 Views Running an IDL script from ENVI GUI  1546  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...
0 1546
16 Jan 2009 03:26 PM
1 Replies and 987 Views extracting desert vegetation from a quickbird image--will this work?  987  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...
1 987
15 Jan 2009 09:24 AM
1 Replies and 1278 Views Creating a big 2D array in ENVI batch mode  1278  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...
1 1278
14 Jan 2009 08:38 AM
2 Replies and 1600 Views Problems georefencing  1600  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...
2 1600
14 Jan 2009 04:21 AM
1 Replies and 1156 Views Problem with SOPT4 atmospheric correction using FLAASH  1156  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
1 1156
13 Jan 2009 09:50 PM
3 Replies and 1158 Views Aster File format  1158  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...
3 1158
13 Jan 2009 09:21 AM
5 Replies and 1345 Views Georeferencing in mountain area  1345  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
5 1345
12 Jan 2009 10:02 AM
1 Replies and 1375 Views RMSE  1375  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;
1 1375
12 Jan 2009 04:48 AM
0 Replies and 1219 Views two questions  1219  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...
0 1219
10 Jan 2009 01:04 PM
1 Replies and 1338 Views FLAASH with Quickbird  1338  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.
1 1338
07 Jan 2009 10:15 AM
1 Replies and 1309 Views ENVI programming - display window  1309  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
1 1309
05 Jan 2009 02:48 PM
1 Replies and 1279 Views Regarding removal of Bad lines from Hyperion data  1279  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.
1 1279
04 Jan 2009 11:48 PM
7 Replies and 1397 Views Landsat mosaic  1397  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
7 1397
04 Jan 2009 08:00 PM
3 Replies and 1370 Views problem in MODIS.sli  1370  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...
3 1370
28 Dec 2008 06:29 AM
1 Replies and 1315 Views ENVI Feature Extraction Vector always with pixel-based projection  1315  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...
1 1315
22 Dec 2008 10:39 PM
5 Replies and 1484 Views a question about CLASS_MAJORITY_DOIT  1484  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!
5 1484
14 Dec 2008 12:17 AM
1 Replies and 1875 Views convert_modis_data  1875  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 ...
1 1875
12 Dec 2008 01:30 PM
1 Replies and 1141 Views classification problem:):)  1141  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...
1 1141
06 Dec 2008 04:44 AM
2 Replies and 1406 Views Basic Statistics  1406  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...
2 1406
03 Dec 2008 11:29 AM
0 Replies and 1680 Views help , calculate solar zenith, solar azimuth, sensor zenith, sensor azimuth  1680  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
0 1680
03 Dec 2008 06:33 AM
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Page 105 of 137 << < 103104105106107 > >>