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2 Replies and 1936 Views
Maximum NDVI composite 1936 2
Started by Deleted User
Hi,
I'm building composite images using ENVI Band Math. The average composite was easy to do but now I'm trying to figure out a way to create a Maximum NDVI composite, and it seems to be too complicated to do with Band Math. Or is it
Has anyone found out a way to create maximum composites in ENVI
Jukka
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2 |
1936 |
22 Aug 2005 01:20 AM |
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1 |
1829 |
18 Aug 2005 03:35 AM |
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0 Replies and 1905 Views
scatter plot or exporting pixel data 1905 0
Started by Deleted User
I'm looking to do something very simple. I want to create a scatter plot of the data within the same ROI of two files (each only one band). I want the plot to contain all the data from the entire ROI, not just the roi within the image window. If ENVI can't do this, I'm looking for a way to export the pixel values of the two files and input them into something like excel to create a scatter plot. thanks
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0 |
1905 |
15 Aug 2005 04:22 PM |
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0 Replies and 1712 Views
ASTER level 1A 1712 0
Started by Deleted User
hello,
I have problems with georeferencing aster level 1A in ENVI 4.0. Can you help me
thanks,
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0 |
1712 |
09 Aug 2005 09:04 AM |
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0 Replies and 1928 Views
Multi-line widget_string 1928 0
Started by Deleted User
Is there anyway to have a multi-line widget_string I can do this with widget_text, but that's not auto-managed.
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0 |
1928 |
02 Aug 2005 10:24 AM |
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0 Replies and 2146 Views
ETRS89 2146 0
Started by Deleted User
Hi,
I have got an image projected in a Lambert Azimutal Equal Area projection that was generated using the ETRS89 datum. Does anyone know how to set this kind of Map Projection in ENVI
thanks
sergio
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0 |
2146 |
21 Jul 2005 06:21 AM |
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2 Replies and 1804 Views
Leica ADS-40 1804 2
Started by Deleted User
Howdy all,
I was curious if anyone is using ENVI to process Leica ADS-40 files I heard a rumor that someone in the industry was but can't confirm that!
Thanks!
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2 |
1804 |
20 Jul 2005 08:03 PM |
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0 |
1787 |
19 Jul 2005 03:58 PM |
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0 Replies and 2051 Views
Spectroradiometers with Envi 2051 0
Started by Deleted User
Hi Gentlemens
I' m beginner with Envi 4.1, I need Help under information for the Spectroradiometers, like mark, model, price and personal experience the us with ENVI..
My experience was with images Aster, Landsat & Spot on class vegetation, NDVI, SAVI
I hope you can help me
thanks in advance
Best regards
**Sorry for my bad english, I learning now
Bye
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0 |
2051 |
12 Jul 2005 03:38 AM |
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1 Replies and 1593 Views
Spectroradiometers with Envi 1593 1
Started by Deleted User
Hi Gentlemens
I' m beginner with Envi 4.1, I need Help under information for the Spectroradiometers, like mark, model, price and personal experience the us with ENVI..
My experience was with images Aster, Landsat & Spot on class vegetation, NDVI, SAVI
I hope you can help me
thanks in advance
Best regards
**Sorry for my bad english, I learning now
Bye
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1 |
1593 |
12 Jul 2005 03:38 AM |
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2 |
2269 |
11 Jul 2005 05:49 AM |
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0 Replies and 1722 Views
Background or 0 values 1722 0
Started by Deleted User
I am using ASTER data, and have mosaicked several images. I have saved the background as 0 value. This obviously has an affect on Stats and further processing. Can anyone recomend what is the best method for excluding background values on calculating stats and processing Thanks
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0 |
1722 |
10 Jul 2005 07:20 AM |
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1 Replies and 2055 Views
importing raw bin image file 2055 1
Started by Deleted User
Hello.
I am trying to import a raw binary image file into ENVI to visualize it.
The file is a 2 Go Alaska radar image in a .BIN file. (http://www.asf.alaska.edu/4_4_1_1.html) They recommend using ENVI to view the file.
There is a little text with the bin file with file information about the BIN file :
ant125m.bin: unsigned 8 bit (BIL) raw binary image
no. of rows : 41779
no. of columns: 48333
Upper Left X: -3174433.000
...
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1 |
2055 |
23 Jun 2005 07:30 PM |
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0 Replies and 1971 Views
Map Coordiates Convertor ASCII 1971 0
Started by Deleted User
Hi all,
I'd like to convert some lat/long coordinates into metric coordinates using ASCII coord. convertor in ENVI 3.4. How can I separete the degrees,the minutes and the seconds in the ASCII file There must be a separator/delimiter. Can someone send me a sample file
Thanks in advance.
Vasil Lefterov
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0 |
1971 |
02 Jun 2005 03:45 PM |
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0 Replies and 2064 Views
Map Coordiates Convertor ASCII 2064 0
Started by Deleted User
Hi all,
I'd like to convert some lat/long coordinates into metric coordinates using ASCII coord. convertor in ENVI 3.4. How can I separete the degrees,the minutes and the seconds in the ASCII file There must be a separator/delimiter. Can someone send me a sample file
Thanks in advance.
Vasil Lefterov
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0 |
2064 |
02 Jun 2005 03:45 PM |
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0 Replies and 1804 Views
Ignoring zero when calculating co-occurrence measures 1804 0
Started by Deleted User
HI-
I am trying to calculate second-order texture measures using the co-occurrence filter in ENVI on images that are not squares. ENVI automatically assigns a value of zero to the area outside my area of interest. Does anybody knows how to deal with the zero in the co-occurrence filter
I tried subsetting my image using a ROI, but it still seems like the values outside the subset are set to zero, and they induce some bias in the calculation of the texture near the edge of the image.
...
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0 |
1804 |
31 May 2005 09:59 AM |
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0 Replies and 1964 Views
arrays of arrays 1964 0
Started by Deleted User
I want to use (or simulate an array of arrays).
I got a set of images, represented by 2D arrays, that I want to put in an array such that it can be used in a loop.
I try to simulate this with a 3D array, but I not sure about syntax (in fact, what a wrote did not work...) :
imgArray=FINDGEN(nbImages,width,height)
;in a loop (where img is a 2D array)
DRVtab&91i&93=img
;later, in another loop
img=DRVtab(i,*,*)
When I try to acces to an element of img, I get an 'out of range' error...
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0 |
1964 |
20 May 2005 02:04 AM |
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0 Replies and 1867 Views
Calibration of AVHRR images in ENVI Batch Mode 1867 0
Started by Deleted User
I would like to calibrate a large number of AVHRR ESA Sharp images in Batch mode using the ENVI_AVHRR_CALIBRATE_DOIT procedure. These image data are associated to a leader file needed to make the calibration process. When I run the batch I have to supply interactively the name of the leader file for each image. This could be avoided if the procedure should accept a keyword realated to this leader file, but this point is not included in the description of ENVI_AVHRR_CALIBRATE_DOIT. Is there any...
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0 |
1867 |
18 May 2005 05:16 PM |
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1 Replies and 2088 Views
Mangrove area calculation 2088 1
Started by Deleted User
We are constructing a large shrimp farm in Saudi Arabia (near Jizan) and want to do a baseline study of the existing mangrove area from satellite imagery. Can your software do this or could you refer us to a consultant to do this for us
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1 |
2088 |
18 May 2005 01:35 PM |
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0 Replies and 2037 Views
Spectral Library Mixtures 2037 0
Started by Deleted User
Hi,
I was wondering wether anyone had developed anything to create automated linear spectral mixtures from spectral ibraries. I want to create mixtures at set percentages (say 1 increments) in a linear mix between every possible combination of two of the spectra in my library (29 spectra). If you could help me out that would be greatly appreciated. Thanks
Daryl
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0 |
2037 |
13 May 2005 11:28 AM |