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1 Replies and 1524 Views
Importing Radar 1524 1
Started by Deleted User
I am trying to import a RADARSAT file, georeference it and convert it to Beta Nought. Once you do one of these procedures however, it outputs the result as an ENVI file. However, seeing as both of these functions requires a RADARSAT file I can only do one or the other it seems, not georeference and then continue with the georeferenced output to convert to beta nought.
Any suggestions as to what I'm doing wrong!
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1 |
1524 |
06 Nov 2006 07:34 AM |
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1 Replies and 1672 Views
about PLATE_CARREE_1KMG Projecton 1672 1
Started by Deleted User
Dear Sir/Madam£¬
I have some SPOT-vegetation NDVI files, which format is *.hdf. ENVI 4.2 can read them easily. But these file have not projection. They have the same README files as following:
PRODUCT_ID V1KRNS10__19990101E
BAND_REF B3
QUICK_LOOK_BAND NDV
MAP_PROJ_NAME PLATE_CARREE_1KMG nom provisoirement egal au code
MAP_PROJ_FAMILY UNPROJECTED
MAP_PROJ_CODE PLATE_CARREE_1KMG
MAP_PROJ_UNIT DEG...
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1 |
1672 |
06 Nov 2006 06:19 AM |
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1 Replies and 1672 Views
Spectral Angle Mapper for classifying table grapes 1672 1
Started by Deleted User
Hello...ENVI USERS
I need to ask about Spectral Angle Mapper (Sam) Classification to classify 'table grapes' with Sensor Tm, Spot Aster.
Thanks in advance
Best regards,
David Lopez
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1 |
1672 |
06 Nov 2006 05:24 AM |
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1 Replies and 1486 Views
cherche manuel 1486 1
Started by Deleted User
Je cherche un manuel d'utilisation de l'ENVi en langue française
Cordiallement
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1 |
1486 |
03 Nov 2006 07:29 AM |
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1 Replies and 1897 Views
TRMM hdf data Geometric Coordinate System 1897 1
Started by Deleted User
Dear friends,
I have a TRMM HDF data. Some details of the data is as follows:
LongName: TRMM 3-Hour 0.25 TRMM and Other-GPI Calibration Rainfall Data
Short Name : TRMM_3B42
Version Id : 6
BoundingRectangle:
WestBoundingCoordinate: -180.0
NorthBoundingCoordinate : 50.0
EastBoundingCoordinate : 180.0
SouthBoundingCoordinate : -50.0
How can I transform this data into WGS1984 Lat Long I'm really new to ENVI. Really help somebody could help.
Thank you very much guys.
Chee...
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1 |
1897 |
02 Nov 2006 07:06 PM |
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1 Replies and 1809 Views
converting sinusoidal projection to lambert conformal conic projection for china 1809 1
Started by Deleted User
hi
i have a sinusoidal world map projection which i am trying to convert to lambert conformal conic projection (showing china) using convert map projection, each time it would give a a part of south america instead of the whole map. i am preety new at this
i would really appreciate all ur help
thanks
sunny
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1 |
1809 |
01 Nov 2006 08:53 AM |
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1 Replies and 1393 Views
Brightness histogram and colour ramps 1393 1
Started by Deleted User
Hello
Is there a way to get the colour ramp in the annotation window to match the display histogram
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1 |
1393 |
01 Nov 2006 07:06 AM |
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0 Replies and 1443 Views
unsigned integer 1443 0
Started by Deleted User
I had a bit of an issue with a radar project I was undertaking:
The radar data was brought into ENVI as unsigned integer data, which was fine for doing everything except filtering - when I filter data it turns it into integer data, and then doesn't display properly. If I edit the header data type back to unsigned integer it still won't work.
How can I get round this problem I haven't realy used IDL before so any programming may have to be explained step by step!
Also, is there an easy...
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1443 |
27 Oct 2006 08:52 AM |
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1 Replies and 1382 Views
ENVI3.5 Export error 1382 1
Started by Deleted User
Hi ,
I am using ENVI3.5, when i export the img file to other format (say arcview bil, erdas lan), there is a shift in the coordinates.
This error was identified, when I overlayed a vector layer (generated from exported format) on the original img file. The vector is overlayed somewhere. So i am struggling to export to other gis softwares.
If any have encountered this problem, kindly share your thoughts.
Thanks,
P. Vadivelan
India
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1 |
1382 |
25 Oct 2006 12:08 AM |
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1 Replies and 1542 Views
compute roi separability 1542 1
Started by Deleted User
Hello.
I know how to compute ROI separability interactively. However I'd like to do this from a batch job and can't find it in the programming documentation. Does anyone know the name of the routine that does this
Thank you.
Tracey
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1 |
1542 |
24 Oct 2006 05:39 AM |
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1 Replies and 1654 Views
Layer classifications on panchromatic 1654 1
Started by Deleted User
I have a SAM Rule hyperspectral classification for an endmember. I've used the histogram to accurately dilineate the target endmember. I've applied a color table, so that there is a color gradient for the target. I'd now like to be able to take the target classification (without losing the color table gradient applied) and then layer them on top of a one band image. How would I do this in envi
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1 |
1654 |
23 Oct 2006 09:15 AM |
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1 Replies and 1371 Views
composite in bandmath 1371 1
Started by Deleted User
Dear Sir/Madam,
I want to make a composite of NDVI map from four layers in bandmath for getting the maximum value from all the layers. Can anybody suggest me how to write the equation for this.
Regards
Bikash
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1 |
1371 |
23 Oct 2006 09:07 AM |
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1 Replies and 1456 Views
Auto registration 1456 1
Started by Deleted User
I am geometrically correcting AISA hyperspectral data. I would love the use the GPS/INS data acquired during the flight, but the system is not operating correctly (something about the cmigits interface). Anyway, has anyone had any success with autoregistration If so, how do I implement it Are there any other methods for roll correction in ENVI I know that PCI has a rollcorr module that helps to correct for roll. Does ENVI have anything similar
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1 |
1456 |
23 Oct 2006 08:45 AM |
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1 Replies and 1876 Views
target dtection and PCA 1876 1
Started by Deleted User
For the purpose of target detection, I carried out PCA transformation of a HYDICE 210 band image. Now to do thresholding analysis, I want to take it to MATLAB. I saved it in GeoTIFF format. But it doesnt open there and gives a error that its 32 bit and needs to be 16 bit image. How to solve the problem. Without PCA, I am able to save the image as GeoTIFF and transport it into MATLAB and open the image.
Secondly, I am not open all the image together, 210 bands. I open it one by one. Any one ...
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1 |
1876 |
13 Oct 2006 11:26 AM |
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1 |
2102 |
08 Oct 2006 09:52 PM |
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1 Replies and 1477 Views
error msg while converting map projections 1477 1
Started by Deleted User
Hi i am relatively new to ENVI, and am trying to a convert a sinusoidal world map projection into lambert conformal conic projection, i created the following Lambert customised map using 0E, 0N, central meridian 110E, two parallels 25N and 45N. (want to show china region upfront) but when i use the convert map proj. tool it always gives me error 'array dimension must exceed 0' ,
but with the same projection i was able to convert a demo geo lat/lon map found in ENVI to lambert proj using the pr...
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1 |
1477 |
26 Sep 2006 12:17 PM |
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0 Replies and 1347 Views
Different results with class_doit call 1347 0
Started by Deleted User
Hi,
I want to classify an 8 band image using the maximum likelihood
classifier in ENVI 4.0. I want to use a script to automate this
process, as I want to do it over a large range of different images and
settings.
However, if I classify all eight bands using the ENVI GUI I get a
completely different classification image then I do when I do it in
code. If I only use four or less of the bands, then the results are
exactly the same, however if I try to use anymore then four of the
ban...
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1347 |
24 Sep 2006 09:52 PM |
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0 Replies and 1430 Views
MNF (MTMF) on ASD field spectra 1430 0
Started by Deleted User
I have created an image from mulitple ASD point spectra (one pixel per field sample) and am looking into running the mixed tuned match filtering (MTMF) algorithim to identify certain pixels of specific species type. This algorithms requires that data be in MNF space but when trying to transform these data, the output is blank (NaN's).
In talking with other professionals, it was suggested that MNF would not work on these data due to the excellent signal-to-noise ratio in the ASD instrument....
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1430 |
22 Sep 2006 12:14 PM |
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0 Replies and 1503 Views
I want calculate the mean band from 200 bands, how? 1503 0
Started by Deleted User
I want calculate the mean band from 200 bands,and I use the expression:
(b1b2b3.......b200)/200
it is so long and stupid, i wish anybody could help me.
hoho
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0 |
1503 |
21 Sep 2006 04:12 AM |
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1 Replies and 1451 Views
aster radiance 1451 1
Started by Deleted User
I would like to find out if it is possible to convert aster level 1b radiance to reflectance for spectral analysis and matching I know I can order additional products through aster but would prefer to convert data I already have. Thanks
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1 |
1451 |
15 Sep 2006 04:28 PM |