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0 Replies and 1269 Views
Consulta Modis 1269 0
Started by Deleted User
Hola, he bajado una imagen Modis 1B de 250 m de resolución y no he podido georeferenciarla. Escribo desde Argentina y les mando un saludo a todos. Si pueden ayudarme se los agradezco. Hasta pronto.
Marcelo
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1269 |
05 Apr 2007 10:28 AM |
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0 Replies and 1223 Views
ENVI crashes 1223 0
Started by Deleted User
OS: Windows XP2
Envi crashes everytime I try to open, or save to ESRI GRID Files
Otherwise everything else is working fine
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0 |
1223 |
04 Apr 2007 09:48 AM |
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1 Replies and 2136 Views
ENVI training 2136 1
Started by Deleted User
I'm a beginner user of ENVI for hyperspectral imaging. I 'm looking for training sessions/ workshops to learn preprocessing, espacially radimetric and atmospheric corrections ENVI procedures for spectral analysis. Does anyone have experience with ITT workshops he/she can recommand or other means of tutorials Any one who attended ENVI 300 workshop
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1 |
2136 |
29 Mar 2007 05:00 AM |
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0 Replies and 1171 Views
Advice on the ENVI_OUTPUT_TO_EXTERNAL_FORMAT Command 1171 0
Started by Deleted User
Hi,
I have been computing solar zenith angle values (in the form of 2000x2200 arrays) and wish to save them using the ENVI_OUTPUT_TO_EXTERNAL_FORMAT command.
This is the code I have at the current time:
sza_16 = uint(sza*100)
envi_write_envi_file, sza_16 , ns=ns, nl=nl, nb=1, pixel_size=&91psizex,psizey&93, xstart=xstart, ystart=ystart, map_info = map_info, interleave=0, r_fid = out_fid_sza, data_type=12, out_dt=12, /in_memory
out_file =outdir'test.tif'
ENVI_OUTPUT_TO_EXTERNAL_F...
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0 |
1171 |
28 Mar 2007 10:10 AM |
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0 Replies and 1426 Views
filter > convolution > maximum 1426 0
Started by Deleted User
Dear Envi community,
I am trying to apply a convolution process with a user defined kernel. My goal is not to change the size of kernel but to get the --maximum value-- inside the kernel. The Envi options include high and low pass filters, but not maximum or minimum values.
Comments or suggestions are highly appreciated.
Kind Regards,
Jesus Anaya
www.jesusanaya.com
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1426 |
26 Mar 2007 07:23 AM |
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0 Replies and 1300 Views
Georeference MODIS 1300 0
Started by Deleted User
Dear all,
I'm new in the ENVI batch mode and i need to call the Georeference Data
corrispinding to the Data Specific utilities of MODIS.
Do you have any suggestion for programming
Tanks,
Giorgia
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0 |
1300 |
23 Mar 2007 04:03 AM |
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0 Replies and 1333 Views
Building/applying masks on the fly in ENVI batch mode? 1333 0
Started by Deleted User
I want to calculate statistics on a specifc spatial (and spectral) subset in a series of many registered images. Some data values, however, may be invalid (negative or zero) depending on the image. Without masking, my batch code is reallyl simple - something like ,
FOR i=0, nfiles-1 DO BEGIN
ENVI_OPEN_FILE, infiles&91i&93, R_FID=fid
ENVI_DOIT, 'ENVI_STATS_DOIT', fid, DIMS=xdims, POS=xpos, MEAN=mean
ENDFOR
I'm not seeing an easy way to mask the invalid data before the ENVI_STATS_DO...
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1333 |
20 Mar 2007 03:17 PM |
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0 Replies and 1580 Views
Envi Hangs 1580 0
Started by Deleted User
OS: Windows XP SP2
Application: Envi 4.3
Envi 4.3 just start to hanged. Double click on the Ico Envi 4.3 image is display. Then just hangs. Is they a problem with latest Microsoft Updates & RNVI 4.3
IDL works.
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0 |
1580 |
20 Mar 2007 09:34 AM |
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2 Replies and 1633 Views
envi doesn't display vector overlays in color and fails to set some default colors in preferences. 1633 2
Started by Deleted User
Hi all.
I am using ENVI 4.3IDL on WindowsXP
I am unable to set a color, which is set by the widget having the form of a small colored square, and right-click on which brings a drop-down menu with list of colors.
When I display a raster image and try to overlay it with a vector file, the overlayed vector is displayed only in gray ñolors (or black or white).
When I bring up the dialog to set vector layer parameters, it, as usual, contains a small square with color sample, right-click o...
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2 |
1633 |
20 Mar 2007 08:41 AM |
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1 Replies and 1780 Views
Looking for Band Math normalization script 1780 1
Started by Deleted User
Friends,
I am looking to normalize pixel values within each band of a Landsat ETM stack. It would be elegant if the output was a stack of normalized bands, but this doesn't seem obvious. The function must look something like:
result = (b1/(mean b1) X 100)
Any help would be appreciated.
Doug
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1 |
1780 |
15 Mar 2007 02:21 PM |
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1 Replies and 1437 Views
Convert to reflectance and DOS 1437 1
Started by Deleted User
Hello,
I'm looking for some advice on how to process several Landsat ETM scenes. I need to convert them to reflectance values and perform DOS in one step. The ENVI tools to do this are seperated and once you have converted an image to radiance and done DOS you cannot easily convert many bands to reflectance at once. Maybe I am missing something but I have not found an easy solution to process large numbers of scenes in an efficient way. Perhaps someone has a batch routine or IDL script they...
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1 |
1437 |
15 Mar 2007 11:05 AM |
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1 Replies and 2517 Views
Replacing NaNs 2517 1
Started by Deleted User
Commonly I get image data from external sources that contain NaN's as missing value codes. Does anybody know how I can globally replace these NaN's in an image with a real number.
Thanks for the helo,
Alf
Western Australia
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1 |
2517 |
12 Mar 2007 06:09 PM |
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1 Replies and 1374 Views
selection of pixel values when roi is defined by a vector that cuts partial pixels 1374 1
Started by Deleted User
I can't find any information on how pixels are selected as being a part of an ROI if the ROI was created using a vector layer which contains partial pixels. I'm trying to export my roi to ascii and am cross checking to see which pixels are actually exported. I thought it might be if the ROI just touches a pixel it would be included, but that doesn't seem to be the case. Then i thought it was the centroid of the pixel, but that isn't it either. what is the selection criteria and is there an abil...
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1 |
1374 |
28 Feb 2007 01:34 PM |
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1 Replies and 2116 Views
SARscape: geocoding 2116 1
Started by Deleted User
Hi,
my question belongs to the task 'geocoding and radiometric calibration'
Must have the DEM and the Input file the same spatial extend I need to process just a little part out of big a SAR scene! So does it proceed only the part where a DEM information does exsist or do I need to cut it before By the way, what type of file shall be the input DEM (ASCII)
I'm hopefully waiting for help,
Regards Marion
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1 |
2116 |
23 Feb 2007 05:32 AM |
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1 Replies and 1485 Views
Save as MRSID 1485 1
Started by Deleted User
Gentlemen
I would like to know how save the envi file in to mrsid file It's possible
Thanking in advance
David
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1 |
1485 |
21 Feb 2007 11:40 AM |
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1 Replies and 1491 Views
Landsat TM calibration parameters 1491 1
Started by Deleted User
I've downloaded some Landsat ETM images along with their metadata file which includes all the parameters needed for the calibration.Neverthless the program doesn't let me insert them manually and i have tried various ways to write them correctly in the header file but with no success up to now.Can anyone help me on thatI've got ENVI 4.0
Thanks in advance
Christina
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1 |
1491 |
20 Feb 2007 08:37 AM |
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1 Replies and 1271 Views
Overlaying Thermal IR image on DOQ basemap 1271 1
Started by Deleted User
Does anyone know how to import Multispectral data into ENVI to overlay it on a Digital Orthophoto Quadrangles (DOQ) basemap
Thanks,
Muhammad
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1 |
1271 |
13 Feb 2007 01:32 PM |
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0 Replies and 1733 Views
Help on ENVI error message --spatial pixel editor 1733 0
Started by Deleted User
I'm trying to replace bad column values with average and receive the error message below when I try to save. Data is unregistered Hyperion reflectance.
envi_write_spatial: An error has occurred during processing
Error: 'OPENU: Error opening file. Unit: 100, File:
C:\path to my data
The result may be invalid.
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0 |
1733 |
06 Feb 2007 01:56 PM |
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1 Replies and 1430 Views
Co-registration 1430 1
Started by Deleted User
Hi,
could someone kindly tell me how I can assemble say four images ,that contain overlapping areas/features.what comes next after selecting GCPs image-to-image
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1 |
1430 |
30 Jan 2007 06:42 AM |
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1 Replies and 1610 Views
DEM EXTRACTION ERROR 1610 1
Started by Deleted User
I'm using Envi 4.3 and SPOT 4 Pancromatic (Level 2A) images. Dem extraction wizard gives an error in the 6 th step when I try to examine the epipolar results (clicking RGB=Left,Right,Right or the other). also same error in the 8 th step.
When the program starts to create left epipolar image with a method of bilinear resampling, it gives this error:
envi_epipolar_warp_doit: An error has occured during processing
Error: 'Array dimensions must be greater than 0.' The result may be invalid...
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1 |
1610 |
29 Jan 2007 10:06 AM |