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0 Replies and 2802 Views ENVI_ROI_SEPARABILITY_DOIT  2802  0 Started by  Deleted User Dear all: I have a question about the use of ENVI_ROI_SEPARABILITY_DOIT, Does someone know how to use itany help would be appreciated.
0 2802
26 Jun 2003 01:04 AM
0 Replies and 2237 Views AST07 and AST05  2237  0 Started by  Deleted User Just wondering if when ENVI 3.6 service pack 1 opens a AST05 or AST07 file is the georeferenced. If not is there a quick and easy way to use the georeferencing information that is imported during this method to georeference these files in ENVI. Thanks
0 2237
14 May 2003 04:05 AM
0 Replies and 2596 Views Loading Registration Warp Coefficients into ENVI  2596  0 Started by  Deleted User Is there a way to load polynomial warp coefficients (kx,ky)into ENVI when registering images ENVI allows a user to save out the polynomial coefficients via a text file, but, does not have the ability to load in the coefficients. In this instance, loading GCPs and developing the coefficients in ENVI is not an option.
0 2596
13 May 2003 12:04 PM
0 Replies and 2533 Views Loading Registration Warp Coefficients into ENVI  2533  0 Started by  Deleted User Is there a way to load polynomial warp coefficients (kx,ky)into ENVI when registering images ENVI allows a user to save out the polynomial coefficients via a text file, but, does not have the ability to load in the coefficients. In this instance, loading GCPs and developing the coefficients in ENVI is not an option.
0 2533
13 May 2003 12:04 PM
1 Replies and 2607 Views Image crop  2607  1 Started by  Deleted User Hello, Can anybody let me know how to crop or clip an image using region of interest. Praveen.
1 2607
12 May 2003 12:20 PM
0 Replies and 2405 Views topographic modeling  2405  0 Started by  Deleted User Hi everyone Does anyone know what the unit of measurement for the curvatures (eg, plan, profile etc) calculated by the topographic modeling function is Is it in degrees per meter (or other elevation unit) Thanks Julie Wallace.
0 2405
10 May 2003 10:45 AM
1 Replies and 3949 Views pixel size changes  3949  1 Started by  Deleted User Hi everybody; I have Level 1 B Aster images. I would like to chage ground resolution of VNIR from 15 m to 30 m. I could find the right tool. Is there any way to handle this process
1 3949
07 May 2003 11:19 AM
0 Replies and 2652 Views Georeferenced Mosaicking in 3.6 failing  2652  0 Started by  Deleted User If I perform a georeferenced mosaic of integer data in ENVI 3.6 I get strange results. Some values are arbitrarily shifted by 10's of thousands. Some are wrapped and shifted in position. Georeferenced mosaicking of the exact same data in 3.5 works perfectly. Pixel based mosaicking of the same data in 3.6 does work. Anybody experiencing similar results
0 2652
05 May 2003 09:23 AM
0 Replies and 2684 Views Pseudo endmember fraction images from high spatial res. image  2684  0 Started by  Deleted User Hello, Does anyone have an IDL program which will take a classified high spatial resolution image and aggregate it into a lower spatial resolution multi-band fraction image Essentially, I want the output image to have n bands (n being the number of classes in the high-res image) and the pixel values are the percent cover. Thanks in advance, Casey Cody
0 2684
30 Apr 2003 04:49 AM
0 Replies and 2351 Views NOAA-10, 11 calibrations  2351  0 Started by  Deleted User Hi, I'd really like to use the AVHRR calibration function on NOAA 10 and 11 data. However, the function only gives a choice of NOAA 12,14,15 or 16. Is there an expanded version of this function anywhere, or any other possible approach I'm using ENVI 3.5 & IDL. Thanks, Andrew Tupper
0 2351
13 Apr 2003 09:07 PM
0 Replies and 2480 Views geotifs and using them in ArcMap  2480  0 Started by  Deleted User Hello! I have an Aster geotif and I have no problems opening it up in ArcMap. The problem I have is that the geotif is too large. I'd rather have a smaller image so things will load faster in ArcMap. Does anyone know how to crop a geotif how do I prevent losing the georeferenced data from the geotif when I crop it thank you in advance! Angela Lo
0 2480
10 Apr 2003 02:33 PM
2 Replies and 2501 Views Writing to a specific line of a BIP or BIL file?  2501  2 Started by  Deleted User Hi all: I was hoping someone might know, using an IDL and/or ENVI function, how do I write data to a specific LINE of a BIP or BIL file Its easy to read it (envi_get_slice), but not easy to write that slice (how come no 'envi_write_slice'). The brute force is to load the entire image into memory, assign that specific line the new values, and then rewrite the entire image back to disk. This is EXTREMELY slow. Even using ENVI's spectral tiling routines (which at least minimize the memory ...
2 2501
18 Mar 2003 07:43 PM
0 Replies and 2439 Views About spectral libraries comparison  2439  0 Started by  Deleted User Dear forum members, My little problem is the following: I have a Landsat-tm5 calibrated to reflectance. The Z-Profile of any pixel in the image has as x-axis the integer number of TM-bands (e.g 1 to 7), while the x-axes of the incorporated spectral libraries to ENVI are in Wavelength (from 0.49 to 2.43 I think) when resampled (with the corresponding tool) to TM5 data. So, how is it possible to compare these two diffent kind of information so as to use the hyperspectral capabilities of ENVI o...
0 2439
12 Mar 2003 07:20 AM
2 Replies and 2657 Views Exporting Aster geotif image to ArcMap  2657  2 Started by  Deleted User Good morning all, When I export an Aster scene as a Geotif, and import it into ArcMap, the image is flipped. Features that were formerly in the northeast are now in the southwest etc. Coordinate info is WGS84, SUTM55. The same Geotif file is correctly displayed in applications such as ER Viewer and MapInfo; Geotif's from other sources display correctly in ArcMap, so I suspect that there is something in the way Envi creates a Geotif that is causing the problem in ArcMap. It may be that the p...
2 2657
11 Mar 2003 02:49 PM
0 Replies and 2782 Views database support  2782  0 Started by  Deleted User Can ENVI directly load images from an image database or Does it have an interface for traditional image databases
0 2782
28 Feb 2003 10:35 AM
0 Replies and 2775 Views Classifications  2775  0 Started by  Deleted User Hi everyone, Sometimes I have to export classification images into tif format files to make certain manipulations. But after that I'd like to convert it back into an ENVI classification image to be able to use the classification capabilities. Does anyone know if it's possible to make that conversion. THANKS
0 2775
28 Feb 2003 06:12 AM
1 Replies and 3106 Views Spectral band maths  3106  1 Started by  Deleted User A simple issue where I see no solution with the runtime version of ENVI. What do you think (A) In ENVI RT 3.5sp1, if I try to use 'Menu/Spectral/Spectral resampling' for data which wavelength is in nm (example: 400 nm to 2500 nm) and try to use ENVI's 'Pre-defined filter function', it will not work (error message telling me all bands are out of range) because ENVI is waiting for wavelenght data between 0.4 and 2.5 instead of between 400 nm and 2500 nm. There is no way to specify the unit ...
1 3106
16 Dec 2002 07:17 AM
0 Replies and 3381 Views How to calculate raidance and iradiance in ENVI?  3381  0 Started by  Deleted User I am a new user of ENVI. I am now trying to create temperature maps from the thermal band of Landsat TM. But I don't know which tool I can use in ENVI. Besides, because Landsat 7 has both low gain and high gain in the 6th band, which one should be used for calculating those parameters
0 3381
14 Nov 2002 10:53 AM
1 Replies and 2784 Views Adding User Function (*.pro files) to Runtime ENVI  2784  1 Started by  Deleted User What is the procedue to for adding library functions to Runtime ENVI. Can I use the .pro files or do I need .sav files Thanks.
1 2784
08 Nov 2002 11:31 AM
0 Replies and 3018 Views Looking for vegetation  3018  0 Started by  Deleted User How can i intrepret the MODIS data looking for vegetation areas by using ENVI. can i look for vegetation on MODIS/TERRA VEGETATION INDICES 16-DAY L3 GLOBAL 250M ISIN GRID V003
0 3018
07 Nov 2002 10:09 PM
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