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0 Replies and 1270 Views
batch Output ROIs to ASCII 1270 0
Started by Deleted User
Are there any batch or doit routines that mimic the 'Output ROIs to ASCII' command that is on the ROI tool I can get the ROI data values with ENVI_GET_ROI_DATA but I also need the map coordinates that correspond to each ROI value.
Thanks,
Kyle Cavanaugh
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0 |
1270 |
27 Mar 2008 07:52 AM |
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1 |
1157 |
27 Mar 2008 07:22 AM |
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1 Replies and 1478 Views
Spectral Library from MASTER Spectral Response Files (SRF) 1478 1
Started by Deleted User
Hi,
I am trying to build spectral library to be used in atmospheric correction software (FLAASH). What I am doing is:
1- Copying the wavelengths and spectral response values for each band (VNIR - SWIR) from the MASTER website and saving in seperate folders ( 25 folders total).
2- After this I click spectral -> spectral library -> spectral library builder -> ... Import. I select ASCII file.
3- In this way, I import all the files into spectral libray dialog and the change their name t...
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1 |
1478 |
24 Mar 2008 11:44 AM |
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0 Replies and 1336 Views
neg values for pan-sharpened image 1336 0
Started by Deleted User
Hi,
I have an image, corrected to QuickBird radiance values, that I pan-sharpened. Minimum values in bands 3 and 4, which were close to zero in the multi-spectral image, came up negative in the PC pan-sharpened image. Following up with band ratios produced truly wacky numbers. Has anybody run into this before Is there a way to constrain the lower values to just over 0
Also, I'm trying to figure out how to get the ratio of incoming and outgoing radiance for QuickBird imagery, not just...
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1336 |
21 Mar 2008 09:29 AM |
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0 Replies and 1205 Views
Endmember Collection 1205 0
Started by Deleted User
Somebody could explain me how to use this method or which is the use of this method.
Thanks
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0 |
1205 |
20 Mar 2008 01:59 PM |
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1 Replies and 1335 Views
Masks and Compute Difference 1335 1
Started by Deleted User
Hi. I'm running the Compute Difference method on an island scene. All I really want to do is derive two change classes from one scene in 1988 to another in 2007: vegetation to vegetation (little or no change beyond seasonal, which are minimal as the location is tropical) and vegetation to developed.
I've already georeferenced them and performed a dark object subtraction to minimize atmospheric effects. I would like to be able to eliminate the surrounding ocean water from the analysis but d...
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1 |
1335 |
17 Mar 2008 07:44 PM |
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0 Replies and 1427 Views
Simple Post-Classification Analysis 1427 0
Started by Deleted User
Hello. I produced two separate Maximum Likelihood classifications of the same scene 13 years apart (using the same classes). How can I produce a change detection map (and data) between them based on pixel-level classification differences
Thanks,
Mike
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0 |
1427 |
17 Mar 2008 06:56 PM |
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1 Replies and 1877 Views
Apply Gain and Offset dialog... 1877 1
Started by Deleted User
Hello. In the Gain and Offset Values dialog box, it lists the bands of the image I've chosen sequentially titled 'Band 1, Band 2, Band 3.....'. However, it appears to me that these are not actually identified with the Landsat Bands 1,2,3... of the LS image I've chosen, but instead seem to refer to the bands as they are listed in the Available Bands window. In other words, it seems to me that the lists of band names in the Gain and Offset Values would be the same regardless of whether the band...
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1 |
1877 |
17 Mar 2008 03:29 PM |
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1 Replies and 1202 Views
Have a FLAASH error message. What does this error message mean and how can I solve it? 1202 1
Started by Deleted User
Hi ENVI users
I am using FLAASH in ENVI 4.3 to correct for atmospheric interference in Hyperion data that is L1Gst product. However the module does not run to completion due to the following error message:
Problem: The FLAASH progam exited with the following errors:
ACC error: avrd:No nonblank pixels foundIDL error
CDRIVER 4V 3R2: >>>Wait for MODTRAN4 calculation to finish…..
ACC_AVRD
ACC_HYPER2
ACC_ACC
ENVI_ACC_EVENT
ENVI_FLAASH_PROCESS_MANAGER
$MAIN$
Please, if anyone ca...
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1 |
1202 |
17 Mar 2008 12:25 PM |
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1 Replies and 2002 Views
envi: MODIS hdf projection 2002 1
Started by Deleted User
Hi envi users,
I have MODIS NDVI files which are in its native sinusoidal projection and in .hdf format.
It seems like ENVI cannot read the projection information of these modis hdf files. It displays them but does not read its projection parameters.
I have been using erdas to convert the HDF files into IMG and then bring them into ENVI. Although this works, i want to find out if there is a way to get ENVI to read the modis hdf files projections. I know i can edit the header for each file, ...
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1 |
2002 |
14 Mar 2008 02:00 PM |
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0 Replies and 1082 Views
'envi_stats_doit' / mask 1082 0
Started by Deleted User
I am trying to use 'envi_stats_doit' to calculate statistics of some ROIs. However, I would like to compute the statistics for the pixels not included in a mask image. I am trying to use the mask with envi_stats_doit function (with m_fid and m_pos) to get it. I use the following command:
roi_dims=&91envi_get_roi_dims_ptr(roi_ids&91j&93),0,0,0,0&93
envi_doit, 'envi_stats_doit', fid=fid, pos=pos, $
dims=roi_dims, comp_flag=4, mean=c_mean, $
stdv=c_stdv, cov=c_cov,m_fid=mfid,m_pos=mpos
...
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0 |
1082 |
14 Mar 2008 03:15 AM |
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0 Replies and 1272 Views
ENVI Classification Tools 1272 0
Started by Deleted User
I have been trying to figure out if there is any way to find the centroids after a K-Means classification Does anyone know if this is possible
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0 |
1272 |
12 Mar 2008 07:00 PM |
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1 Replies and 977 Views
Import MODIS Vegitation Continuous Field (VCF) 977 1
Started by Deleted User
I have a problem with opening VCF images on ENVI 4.1. The problem is my MODIS images are in GeoTIFF format instead of HDF. When i open the file, the software cannot recognize the images. How can i change the MODIS images in GeoTIFF format downloaded from GLCF webpage to HDF format or how can i open these VCF images in ENVI Can someone help me Thanks in advance.
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1 |
977 |
11 Mar 2008 08:20 AM |
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1 Replies and 1178 Views
On the atmosphere correction to TM image by using ENVI flaash tech 1178 1
Started by Deleted User
I am a beginner , now i am using flaash to correct a TM image . i am sure that all process is according to the ' FLAASH Module User's Guide'. But the result always appear such as reflectance data distortion , for example most of data are not in the normally range.
So please, someone can give me a advice, may as well detail.
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1 |
1178 |
10 Mar 2008 07:42 AM |
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3 Replies and 1260 Views
MODIS HDF5 1260 3
Started by Deleted User
Hello everybody,
I've downloaded some MODIS files on HDF v5 format, but ENVI can't open them!
I receive a massage like: this version is not supported.
Has anybody had this problem
Appreciated in advance
MBN
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3 |
1260 |
04 Mar 2008 08:48 AM |
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1 Replies and 1121 Views
Exporting DEM 1121 1
Started by Deleted User
I don't know how to export a DEM image with data type of integer to ENVI standard image with the same data type. I have export DEM image to ENVI standard image but the data type was changed to byte instead of integer. Can someone help me with this Thanks in advance.
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1 |
1121 |
03 Mar 2008 03:23 PM |
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0 Replies and 1407 Views
IDL executable with ENVI code 1407 0
Started by Deleted User
Dear Users,
I have a simple code that I want to make as an executable. In theory this should be trivial, but I am getting errors which I don't know how to fix. I'm running IDL v6.3 and ENVI 4.3 on linux. Here the following code for which I want to create the executable:
PRO commandLine
appWorkingDir = (command_line_args( ))&910&93
compile_opt STRICTARR
envi, /restore_base_save_files
envi_batch_init, /NO_STATUS_WINDOW
PRINT, 'This is a test of the commandLine.pro ...'
PRINT,...
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0 |
1407 |
01 Mar 2008 10:10 AM |
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1 Replies and 1520 Views
3D Surface View, vectors won't print 1520 1
Started by Deleted User
Hello,
I'm trying to print a 3D Surface View with a series of vectors overlain on a NAIP aerial photo. The vectors that are either dashed or dotted work fine. However, the solid vectors will not PRINT at all. They show up perfectly on my monitor and I can 'save the surface as' an image file and all the vectors are visible, however, I can't save the surface at a high enough resolution to then print that image instead of printing directly from the 3D Surface view (it appears that the resolutio...
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1 |
1520 |
27 Feb 2008 09:06 AM |
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1 Replies and 1004 Views
ikonos calibration 1004 1
Started by Deleted User
I need to calibrate an ikonos image. How can i do
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1 |
1004 |
27 Feb 2008 08:48 AM |
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0 Replies and 1367 Views
creating layerstack in idl for images 1367 0
Started by Deleted User
Hi,
I created a layerstack of two images in IDL using the following code.
Let's say IMAGE A and IMAGE B have been chosen. both are of samples 2179 and lines 761.
CODE:
layerstack=fltarr(2179,761,2)
layerstack(2178,760,0)=A
layerstack&912178,760,1&93=B
envi_write_envi_file,layerstack,out_name='D:/filename.img'
I get the result subscript out of range subscript encountered: layerstack.
All i'm trying to do is to say the A is the first band of the layerstack and B is the second...
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0 |
1367 |
26 Feb 2008 08:34 PM |