|
|
|
|
|
|
3 Replies and 3393 Views
Free ENVI 5.3 download 3393 3
Started by Vy Nguyen
I've already created an account to download previous ENVI and IDL versions. But I got message that my access is denied due to verification pending process. So I have to wait up to 24 working hour and later on I can download previous version for free. Please reconfirm if I misunderstood any information!
Thank you so much!
|
|
|
|
3 |
3393 |
03 Jan 2017 07:15 AM |
|
4 Replies and 185 Views
Question: Spectral derivative of image in ENVI (no IDL) 185 4
Started by Rainer Bars
Hellos,
I'm looking for a tool or an existing ENVI script to calculate a 1st degree derivative on all spectra of a hyperspectral image.
I assume many others have needed this, so a script likely exists. I couldn't find anything googling around. And as IDL isn't available, I can't use spectral math to call DERIV(s1) on a BIP image, which would do the same thing.
If anything doesn't exist, then it's back to the code editor :-)
Thanks in advance and cheers,
Rainer
|
|
|
|
4 |
185 |
21 Dec 2016 06:46 AM |
|
3 Replies and 152 Views
ENVI tools in ArcGis - extract features 152 3
Started by Luciana Ferreira
Hi,
I'm trying to use the Extract Features with Ruleset function from the ENVI toolset in ArcGis 10.4.
Does the XML ruleset file need to be created by the Feature Extraction module in ENVI Or would there be another way to create rules to be used by the ENVI tool in ArcGIS
Thanks.
|
|
|
|
3 |
152 |
20 Dec 2016 10:35 PM |
|
2 Replies and 194 Views
Loading Headwall Nano Hyperspec Data (.bin) into ENVI 5.4 194 2
Started by agraham1
Hi guys,
I am trying to load some data from the nano hyperspec (.bin) into ENVI. The image cube loads in, but the pixels are not displaying correctly.
Does anyone know if this has to do with the raw format that the data is acquired in The header file appears to be fine, and all the band information is being read. But, every single band appears are noise.
|
|
|
|
2 |
194 |
19 Dec 2016 11:21 AM |
|
2 Replies and 126 Views
Maximum Likelihood Classification Using Spectral Library Files 126 2
Started by agraham1
Hi everyone,
I have been trying to use endmember spectral I collected and saved as a spectral library file to classify surface features between different datasets. As such, ROIs are inconvenient to redraw and use for each new image.
It seems as if the Maximum Likelihood Classification only works with ROI files, and not with spectral library files. Is this the case, or am I doing something wrong
Thanks in advance for your help.
|
|
|
|
2 |
126 |
05 Dec 2016 11:42 AM |
|
2 Replies and 121 Views
Reflectance conversion of level 1T, EO-1 (ALI) dataset 121 2
Started by Pankajini Mahanta
Hi everyone..
I have 3 scene of EO-1 ALI (Advanced land Imager) imagery in Level 1T format. I need to convert them to surface reflectance. Could anybody guide me how to convert level 1T , EO-1, ALI dataset to surface reflectance
Thank you...
|
|
|
|
2 |
121 |
02 Dec 2016 04:15 AM |
|
2 Replies and 121 Views
Method for Aligning Orthomosaics with Distortion 121 2
Started by agraham1
Hi Everyone,
I am curious if anyone could give me some guidance into a method for aligning two UAV orthomosaics from different dates. There are slight distortions in there mosaics which are respectively unique.
They are taken over the same crop field, but the GPS accuracy has given a misalignment. Because of the distortions, some sort of a warp transformation may be needed to get a desired pixel-to-pixel alignment.
Are there any tools within ENVI that could possibly help with this issue
Muc...
|
|
|
|
2 |
121 |
01 Dec 2016 07:49 AM |
|
3 Replies and 130 Views
MosaicRaster- Unable to export raster 130 3
Started by Michael Lefsky
I am running a script that mosaics hundreds of images. I have written similar scripts before so there probably aren't any obvious mistakes. The script runs until the line
MosaicRaster.Export, file, "TIFF".
and then stops with the following error
Unable to export raster.
Execution halted at: MOSAICBATCH 26
Is this a known problem Can you tell me what this error generally refers to I have tried cutting the number of files from 1200 to 250 and that does help, however it doesn't s...
|
|
|
|
3 |
130 |
30 Nov 2016 01:00 PM |
|
1 Replies and 126 Views
Batch FLAASH using ENVI 126 1
Started by Yao Li
Hello,
I have numerous images to be conducted FLAASH atmospheric correction. Could I batch them using ENVI
Thank very much!
Yao
|
|
|
|
1 |
126 |
22 Nov 2016 11:27 AM |
|
3 Replies and 127 Views
Measuring Azimuth direction? 127 3
Started by Matthew Chojnacki
Is there a ENVI tool that can measure and record directional Azimuth or degrees relative to North in a georeferenced image Can polylines as vectors or ROIs record this information Thanks,
|
|
|
|
3 |
127 |
21 Nov 2016 08:40 AM |
|
1 Replies and 153 Views
QUAC 153 1
Started by Itiya Aneece
*sorry if this is a duplicate post. I didn't see a confirmation that the other was submitted successfully, so am posting again.
I'm trying to run QUAC on a Hyperion image but keep getting the error "QUAC correction failed. Unable to extract the endmembers from input raster. Try a different sensor option or apply a mask." I tried this choosing Hyperion and choosing Generic/ unknown sensor. When I run it on a radiometrically corrected image, it says "QUAC correction failed. Max...
|
|
|
|
1 |
153 |
17 Nov 2016 11:30 AM |
|
16 Replies and 179 Views
Linear Spectral Unmixing Tutorial 179 16
Started by James Skeen
Hello ENVI users and Admins,
I'm looking for an easy to follow tutorial for using ENVI to perform linear spectral unmixing on a LANDSAT7 ETM image.
I'm relatively new to this process (MS student) and having a difficult time getting any meaningful results from my analysis, using a V-I-S classification system.
My process thus far includes basic data prep in ArcMap 10.3 (clipping and projecting), digitizing a ground truth image based on random points and a 3x3 pixel (90x90m) square, based on LandS...
|
|
|
|
16 |
179 |
15 Nov 2016 08:28 AM |
|
1 Replies and 139 Views
Image Change Workflow Error 139 1
Started by doug haller
Hello ENVI UsersI am trying to run Image Change Workflow on two Regions of Interest. I am new to ENVI and learning to use it as part of my GIS certification.The Error Message reads: "The input files are incompatible. Only one input file is pixel-based"ContextThe first image is from the NHAP program, date September 9, 1985 The second image is from NAIP, dated: September 20, 2015 I used the ROI tool to select a section of the image. I saved and exported the shape. I used the shape to cre...
|
|
|
|
1 |
139 |
12 Nov 2016 08:58 AM |
|
1 Replies and 128 Views
Bias georeferencing MERIS FR 128 1
Started by Deidre Whitmore
To apply the FLAASH atmospheric correction to a set of MERIS FR images, I
georeferenced each image (L1B level, ENVISAT format) using the dedicated ENVI tool (Georeference ENVISAT MERIS) but it results in a systemic spatial bias. I tried to georeference
MERIS in WGS84 UTM30 or geographic LAT/LON but none of the methods work.
I tested different versions of ENVI but with the same result.
Could you help me with these georeferencing issue please
Thank you in advance
|
|
|
|
1 |
128 |
10 Nov 2016 03:16 AM |
|
6 Replies and 602 Views
pseudo projection in radiometric calibration 602 6
Started by Itiya Aneece
Hello,
I'm trying to perform atmospheric correction on a Hyperion image, but am having trouble maintaining the projection. The original image is in HDF format, with WGS84 projection. When I run the radiometric calibration tool, it changes to a "pseudo projection." I can reproject it, but it won't work with FLAASH if I do. I've tried to reproject the FLAASH output, but it says it needs input coordinates to reproject it. What can I do
Itiya
|
|
|
|
6 |
602 |
08 Nov 2016 01:07 PM |
|
1 Replies and 113 Views
L7 SLC-Off Mosaic Gap Fill? 113 1
Started by James Skeen
Hey guys. Another new guy with his second question in as many days.
I'm using SLC-off data for a project. I'm trying to fill in the SLC gaps in two images of the same scene, 16 days apart (reducing temporal variation, crop rotation, etc). Both of the images, when cropped to my study area, are cloud free. Per the Gap Phase calculator tool, I should have 94 in my study area.
I first used the ENVI Mosaic tool, as suggest on the USGS site. It worked fairly well, but I got what appear to be resampli...
|
|
|
|
1 |
113 |
04 Nov 2016 09:07 PM |
|
1 Replies and 121 Views
My ROI has been shifted 121 1
Started by Bhagawat Rimal
Hi. I am using ENVI 4.8. Ihave prepared ROI according to the spatial feature of my area ..First my ROI is not opened in different year images ( But same place) . Then I have changed it using recouncil ROIvia Map. Now its overlay ( Opened) but it shifted. Please help me to provide the best solution.
|
|
|
|
1 |
121 |
03 Nov 2016 07:32 PM |
|
1 Replies and 106 Views
Extract Min and Max Data from ALL Raster Cells in Layer Stack 106 1
Started by James Skeen
Hey ENVI Users,
I'm looking to extract some crop phenology information from a single-year NDVI layer stack. I need to get the minimum and maximum values for EVERY cell, across 23 layers (the growing season) within my study area. Anyone have an idea how to do this The study area is roughly 2600x1400 pixels.
Thanks,
Andy
|
|
|
|
1 |
106 |
02 Nov 2016 04:50 PM |
|
4 Replies and 104 Views
ROI Tool 104 4
Started by Amy Ward
When I open ROI tools, my tools box is blank. Help
|
|
|
|
4 |
104 |
27 Oct 2016 01:43 PM |
|
2 Replies and 141 Views
e.OpenRaster Problem: Unable to open or read MODIS file 141 2
Started by Hai-Po Chan
Hello,
I have problem to open MODIS file, either .hdf or .tif format. Any hint and help would be welcomed. Thank you in advance.
----------------------------
ENVI> File = 'MOD11A1.A2001337.h28v06.005.2007071122055.hdf'
ENVI> Raster = e.OpenRaster(File, EXTERNAL_TYPE='eos_modis') MOD11A1.A2001337.h28v06.005.2007071122055.hdf Problem: Unable to open or read this file. Execution halted at: $MAIN$
ENVI> Raster = e.OpenRaster(File) Loaded DLM: JPEG2000. Loaded DLM: JPEG. Loaded DLM: HDF5. Loa...
|
|
|
|
2 |
141 |
26 Oct 2016 12:49 AM |