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0 Replies and 136 Views
Digital Orthophoto Quadrangle Data 136 0
Started by Arafat Aydiner
I have DOQ images. I cannot open these files. does anybody know how to lunch this files from ENVI . There is an option but whenever I opened that option the images appear bullury and corrupted.
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0 |
136 |
17 Jul 2003 12:56 PM |
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0 Replies and 129 Views
Subset RIOs by 'Resize(spatial/spectral)' vs. 'Subset Data via ROI 129 0
Started by Orest Kawka
I have just started using ENVI and will be analyzing radar data with its PCA algorithm.
What is the difference between subsetting an image using ROIs using:
a) Resize(spatial/spectral) command on the Basic Tools menu and
b) Subset Data via ROIs command on the same menu.
The two methods seem to be identical except the latter command (b) also allows you to mask the pixels outside the ROI but in the bounding box. When not using the mask in (b) the results seem to be identical to the for...
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129 |
11 Jul 2003 12:16 PM |
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1 Replies and 108 Views
mosaicking georeferenced ASTER data 108 1
Started by Jason Permenter
I would like to mosaic several georeferenced ASTER images (level 1A/B as well as DEMs), but I keep receiving an error that states that ENVI is 'unable to mosaic georeferenced images containing a rotation factor other than zero'. What are my options to correct this problem, while still maintaining the georeferencing information in the data
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1 |
108 |
01 Jul 2003 01:09 PM |
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0 Replies and 126 Views
ENVI_ROI_SEPARABILITY_DOIT 126 0
Started by Xu Weidong
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.
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0 |
126 |
26 Jun 2003 01:04 AM |
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0 Replies and 120 Views
AST07 and AST05 120 0
Started by Daryl Nunn
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
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0 |
120 |
14 May 2003 04:05 AM |
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0 Replies and 101 Views
Loading Registration Warp Coefficients into ENVI 101 0
Started by Julie Spicer
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.
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101 |
13 May 2003 12:04 PM |
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0 Replies and 118 Views
Loading Registration Warp Coefficients into ENVI 118 0
Started by Julie Spicer
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.
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0 |
118 |
13 May 2003 12:04 PM |
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1 Replies and 114 Views
Image crop 114 1
Started by Ivy Manohara
Hello,
Can anybody let me know how to crop or clip an image using region of interest.
Praveen.
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1 |
114 |
12 May 2003 12:20 PM |
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0 Replies and 110 Views
topographic modeling 110 0
Started by J Wallace
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.
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110 |
10 May 2003 10:45 AM |
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1 Replies and 132 Views
pixel size changes 132 1
Started by Arafat Aydiner
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
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1 |
132 |
07 May 2003 11:19 AM |
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0 Replies and 126 Views
Georeferenced Mosaicking in 3.6 failing 126 0
Started by Eric Pilger
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
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126 |
05 May 2003 09:23 AM |
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0 Replies and 133 Views
Pseudo endmember fraction images from high spatial res. image 133 0
Started by Kevin Cody
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
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0 |
133 |
30 Apr 2003 04:49 AM |
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0 Replies and 105 Views
NOAA-10, 11 calibrations 105 0
Started by Andrew Tupper
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
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0 |
105 |
13 Apr 2003 09:07 PM |
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0 Replies and 107 Views
geotifs and using them in ArcMap 107 0
Started by Angela Lo
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
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107 |
10 Apr 2003 02:33 PM |
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2 Replies and 118 Views
Writing to a specific line of a BIP or BIL file? 118 2
Started by Jonathan Greenberg
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 ...
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2 |
118 |
18 Mar 2003 07:43 PM |
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0 Replies and 117 Views
About spectral libraries comparison 117 0
Started by Rannia Mavrantza
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...
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117 |
12 Mar 2003 07:20 AM |
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2 Replies and 96 Views
Exporting Aster geotif image to ArcMap 96 2
Started by Mal Jones
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...
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2 |
96 |
11 Mar 2003 02:49 PM |
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0 Replies and 121 Views
database support 121 0
Started by Arafat Aydiner
Can ENVI directly load images from an image database or Does it have an interface for traditional image databases
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0 |
121 |
28 Feb 2003 10:35 AM |
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0 Replies and 149 Views
Classifications 149 0
Started by Cesar Santos Gonzalez
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
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0 |
149 |
28 Feb 2003 06:12 AM |
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1 Replies and 163 Views
Spectral band maths 163 1
Started by Alexandre Leroux
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 ...
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1 |
163 |
16 Dec 2002 07:17 AM |