|
|
|
|
|
|
1 Replies and 1811 Views
Reading multi band BigTiff in ENVI 5.1 failing (OK in Classic) 1811 1
Started by Deleted User
I have a 1GB BigTiff GeoTiff file with 5 spectral bands but ENVI 5.1 fails to read in anything other than 1 band. The metadata in ENVI 5.1 indicates it has recognised 5 bands. I can read it in using ENVI Classic 23 bit successfully.
Is there an issue with the reader or a subtlety in the format that suggest this file is slightly misconstructed What's changed form Classic to 5.1
Regards
Andy
|
|
|
|
1 |
1811 |
15 Feb 2016 03:20 AM |
|
4 Replies and 1744 Views
Confusion matrix using ROIs in ENVI 5.2 1744 4
Started by Deleted User
I have ROIs from a high resolution imagery and i want it to compare with Tasseled cap/NDVI/NDBI. My question if we analyse the pixel values (lets say, 0.187) of Tasseled cap/NDVI/NDBI against those ROIs, and then classify these Tasseled cap/NDVI/NDBI using "Raster color slice in ENVI", then generated confusion matrix/kappa coefficient in this way is consider as "Correct" or not
This process is acceptable scientifically or not
|
|
|
|
4 |
1744 |
13 Feb 2016 12:14 AM |
|
3 Replies and 2001 Views
Background data in confusion matrix 2001 3
Started by Deleted User
While performing Confusion matrix, how much it effect the utilization of background data
What it means by the term background data
|
|
|
|
3 |
2001 |
09 Feb 2016 09:34 PM |
|
5 Replies and 4016 Views
ENVI error in open Sentinel-2A 4016 5
Started by Deleted User
Hello!
I am working with the S2a MSI products available from the ESA Data Hub. They are in jpeg2000 format. When I open them using the xml file in ENVI 5.3 i have mistake "File does not appear to be a valid JPEG2000 file"
Can you please give me some guidance Thanks!
|
|
|
|
5 |
4016 |
08 Feb 2016 11:46 PM |
|
4 Replies and 1479 Views
Stacking the Landsat 7 Surface Reflectance Products 1479 4
Started by Deleted User
Dear ENVI forum,
I have Landsat 7 Surface Reflectance (SR) products with MTL file, and i want to simply stack it using that text file, while it gives error of missing band.tif in it. And i'm also unable to open the file through Open as > Landsat > Open with Geotiff due error.
Kindly suggest me what i'm missing here
|
|
|
|
4 |
1479 |
02 Feb 2016 09:12 PM |
|
12 Replies and 2286 Views
EVI result 2286 12
Started by Deleted User
EVI range is from -1 to 1. When i performed it in ENVI, its giving me the range apprx. -390 to 390 at Landsat 2000 data, with the highest peak between -2 to 2 apprx.
Whats this anomaly for
|
|
|
|
12 |
2286 |
30 Jan 2016 03:37 AM |
|
1 Replies and 2097 Views
Landsat 8 Calibration 2097 1
Started by Deleted User
Hi,
I'm trying to calibrate Landsat 8 OLI data to TOA reflectance in ENVI 5.1.0.1 but i can't seem to find the function in the toolbox. I'm new to ENVI 5 but according to the help, from the toolbox i should be able to select Radiometric Correction > Radiometric Calibration. However in my toolbox all i see is Radiometric Correction > Apply Gain and Offset , where is the Radiometric Calibration option which opens up the old dialogue box asking you whether you want to correct to radiance or TOA
...
|
|
|
|
1 |
2097 |
28 Jan 2016 08:48 AM |
|
2 Replies and 1778 Views
NDVI from RGB and NIR images 1778 2
Started by Deleted User
Hi,
I only use ENVI pretty rarely, and was wondering if you could help me with this one:
I've a RGB image and a NIR image of the same valley, and need to extract the "red" pixel values from the RGB and the NIR values from the NIR image.
Firstly, is there anyway I can make a composite, so I can calculate NDVI directly via Band Math
If not, how do I extract the R pixel values from the RGB and the NIR values from the NIR image
Any ideas/help/solutions would be highly appreciated.
Be...
|
|
|
|
2 |
1778 |
25 Jan 2016 07:55 AM |
|
3 Replies and 1605 Views
Change Detection... Image Change workflow tool 1605 3
Started by Deleted User
I want to apply OTSU Algorithm in ENVI, i found "Image Change Workflow" under "Change Detection" tool... the process runs smoothly till the result... in the form of raster and vector, which i supposed, not the output of OTSU... (it should define some class limit out of range of values)...
Is there any other way to perform this algo.
Or any literature about this...
What im missing here in this process... As I consult the ENVI tutorial on this tool for the performance.
|
|
|
|
3 |
1605 |
24 Jan 2016 08:37 PM |
|
4 Replies and 2011 Views
map info string from GeoTIFF files 2011 4
Started by Deleted User
Dear experts,
I am reading a GeoTIFF file to create and ENVI file. I have some trouble getting the header information right.
In a typical ENVI header, the map info string looks like this:
map info = {UTM, 1, 1, 145185, 2189715, 30, 30, 19, North}
I don't understand the usage of the elements 2,3 in this string, both of which are 1. It is described as reference x,y points in file coordinates in the documentations. I don't see any value from GeoTIFF files that resembles these. How should i set the...
|
|
|
|
4 |
2011 |
18 Jan 2016 02:50 PM |
|
1 Replies and 3153 Views
Multi-Spectral Bands (Composite Bands from multiple images) 3153 1
Started by Deleted User
I am trying to combine one image (7 bands) with other images over a given time period to look at the change in vegetation over time. I have combined 21 bands from 3 different images using the layer stacking tool, but I can't select three bands (or layers as they are now) to show as RGB like I could in one original image to emphasize different characteristics of the land.
Is there a way to combine all bands from one image with bands from another image to create one final image containing all ban...
|
|
|
|
1 |
3153 |
12 Jan 2016 04:05 PM |
|
1 Replies and 1311 Views
Question about Hyperion spectral coverage 1311 1
Started by Deleted User
Fig. 1 Band information captured from ENVI
Fig. 2 Bands information from EO-1 website.
Why they are different, especially wavelength of Band77
|
|
|
|
1 |
1311 |
06 Jan 2016 01:28 AM |
|
0 Replies and 1622 Views
MBTiles in ENVI? 1622 0
Started by Deleted User
Is there in project to add export images to MBTiles, it's very useful for now.
|
|
|
|
0 |
1622 |
01 Jan 2016 09:39 PM |
|
1 Replies and 1752 Views
Dowloand ENVI 5.2 Servicepack 1 1752 1
Started by Deleted User
I would like to download ENVI 5.2 Servicepack 1 however cannot find a website from which I could do it. The only thing I found is: http://www.exelisvis.com/Learn/CaseStudiesDetail/TabId/320/ArtMID/1302/ArticleID/14314/ENVI-52-Service-Pack-1-Release-Notes.aspx
I also called to the ENVI service in Warsaw (Poland) but I wans't connected to the person who can give me an answer.
I would be very gratefull for any answer.
|
|
|
|
1 |
1752 |
29 Dec 2015 06:30 AM |
|
0 Replies and 2085 Views
TREND analysis using ENVI? 2085 0
Started by Deleted User
The tools (BuildTimeSeries etc) for handling time series of image data in ENVI is very useful, but is there any suitable IDL/ENVI code for trend analysis of image data (i.e. determining the trend for each pixel in a time series of images) The Mann-Kendall statistics to determine if there is a significant trend and the Theil-Sen slope estimator to estimate the slope of the trend is often suggest and te one I like to use. I tried to find such code for IDL/ENVI, without success. Any suggestion whe...
|
|
|
|
0 |
2085 |
27 Dec 2015 02:17 PM |
|
2 Replies and 1795 Views
error in radiometric calibration for SPOT5 1795 2
Started by Deleted User
Hi,
When I use the tool Radiometric Calibration for SPOT5 imagery, the result values of the green channel and near infrared channel are wrong. When I check the METADATA.DIM it has:
XS1
0.000000
1.990840
2010-12-01T00:00:00.000000
1
XS3
equivalent radiance (W.m-2.Sr-1.um-1)
0.000000
1.692295
2010-12-01T00:00:00.000000
3
However, when I open in Arcgis in the KeyMetadata, it shows Source band Index with: Near Infrared:1; Green:3
How I can fix this. Many thanks.
|
|
|
|
2 |
1795 |
10 Dec 2015 01:26 AM |
|
0 Replies and 1422 Views
Non-traditional Controllers for ENVI 1422 0
Started by Deleted User
Greetings!
Is it possible to use a controller other than a mouse to interact within an ENVI viewer I am interested in connecting to an Xbox controller via the XInput api that Microsoft offers. I think its possible, but I am not sure where to start..any suggestions
Thanks,
-- Stephanie
|
|
|
|
0 |
1422 |
09 Dec 2015 09:53 AM |
|
1 Replies and 1731 Views
ENVI cannot find powerpoint 1731 1
Started by Deleted User
Hello,
I have been using ENVI to chip to powerpoint for quite a while. But today, suddenly ENVI gives me an error about Powerpoint is not installed. Powerpoint is installed as I have a slideshow open. Is there some setting or config file where the path to powerpoint is set Any idea how I might fix this (Using WIndows 7 64-bit)
|
|
|
|
1 |
1731 |
08 Dec 2015 01:24 PM |
|
3 Replies and 1662 Views
shift of evf or vector to roi 1662 3
Started by Deleted User
Hello,
I'dlike to ask you for help. I noticed a small shift of vector positon (evf)from original raster layer.
After supervised image classification I want to convert raster into vector (raster to evf to shape) to be able to make some final corrections and later on to extract pixel values but due to the shift some invalid data were also exported. I corrected this 1 pixel shift in ArcGIS and import shape in ENVI in order to use later for ROI formation. When shape was opened it perfectly matc...
|
|
|
|
3 |
1662 |
03 Dec 2015 03:19 PM |
|
1 Replies and 1720 Views
blank scatter plots 1720 1
Started by Deleted User
I'm having problems simply plotting 2 bands in a 2D scatter plot. Both bands have been stacked and I applied a mask to remove NaN and replace with zero since this seemed to have been a problem from before. Anyways, when I try and create a scatter plot of these two bands, I get a blank plot (no data showing and centered at 0) but I have no idea why (I did manage to create 1 today using the same data set but I can't duplicate what I did anymore). I had done these a bunch of times before a few m...
|
|
|
|
1 |
1720 |
03 Dec 2015 02:59 PM |