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1 Replies and 3366 Views
How to remove NaN From raster.. 3366 1
Started by Deleted User
Hi
I'm a new user of ENVI 4.8
I can't understand how to remove NaN values in a raster ..
I perform the Texture calculation for Rapideye or Sentinel2 data, but when I try to compute ROI Separability The Process stops because there are some NaN in some band..
How con I fix it
Thanks in advance!
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3366 |
07 Apr 2016 02:02 AM |
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1 Replies and 1738 Views
Clipping from classification file 1738 1
Started by Deleted User
I have generated a classification file in ENVI 5.2 using Raster color Slice. The bound (outer boundary in .shp format) clip the Landsat scene to a square box. I want to delete the extra classes out of boundary. Is there any way to clip, or delete those pixels If so, how
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1738 |
31 Mar 2016 09:35 PM |
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2 Replies and 1496 Views
EVF stands for? 1496 2
Started by Deleted User
The vector file in ENVI has extension of ".evf". Does it stands for "ENVI Vecotr File
Kindly make it confirm..
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1496 |
31 Mar 2016 09:31 PM |
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1 Replies and 2341 Views
batch mode for Reproject Raster 2341 1
Started by Deleted User
I have a set of image cubes with a psuedo geospatial reference (tie points) and base map image with a standard projected coordinate system as a reference. I know I can use the ENVI georectify tool 'Reproject Raster' to convert the cubes to my basemap's coordinate system. Can I run the Reproject Raster tool in a batch mode using an IDL script If not is there a series of commands I can call that would do the same thing
http://www.harrisgeospatial.com/docs/...
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2341 |
31 Mar 2016 12:36 PM |
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1 Replies and 1930 Views
SVM method details 1930 1
Started by Deleted User
I have a few questions about the implementation of thesupervised classification method SVM. I'm trying to run grid search crossvalidation using python scikitlearn in order to identify the optimal C andgamma parameters for the RBF kernel. Here are my specific questions:
1) Can you confirm that SVM_DO_IT is based on the libsvm Ifso, I should be able to use scikitlearn for cross validation since it is alsobased on libsvm.
2) Can you explain the data normalization procedure in moredetail I underst...
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1930 |
30 Mar 2016 02:57 PM |
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0 Replies and 1947 Views
IDL & ENVI License Server Security Patch 1947 0
Started by Deleted User
Harris Geospatial Solutions (Exelis VIS) was recently made aware of a security vulnerability in the Flexera FlexNet Publisher technology that is utilized for license management of the IDL & ENVI software products. This security vulnerability applies to all current and older versions of our software and applies to scenarios where a license server is utilized which includes network floating (FL) type licenses and some node-locked (SN) type licenses that use a license manager.
The security vu...
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1947 |
22 Mar 2016 09:52 AM |
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4 Replies and 1584 Views
Georeferenced MODIS 1584 4
Started by Deleted User
I can't to perform layer stacking tool in ENVI, because the programm give me a message that file must be georeferenced. I don't know which projection must be selected and so on.
P.S. i have two files. The first one is MOD21KM and the second one is MOD03.
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1584 |
22 Mar 2016 12:50 AM |
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1 Replies and 1831 Views
Apply forward MNF to Spectra 1831 1
Started by Deleted User
I am using MTMF to match image spectra to library end member spectra.
Hyperspectral Image data is in emissivity, ranging generally from 0.9 to 1. Forward MNF transformation on the image data yields an MNF image with ~10-20 high signal bands, with MNF values ranging from -10 to 10, but most MNF values for the first 20 bands range from -2 to 2. The MNF transformation is very good, it gives very good image discrimination of different materials.
Laboratory spectra are in emissivity, ranging from...
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1831 |
21 Mar 2016 02:14 PM |
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4 Replies and 2172 Views
ASTER Level 2 Surface Emissivity Data - Can&39;t open file in ENVI 2172 4
Started by Deleted User
Hello,
We recently obtained a number of Level 2 ASTER scenes from JSS. For each scene, there are three files, all in .DAT format. I had no issues opening the files containing VNIR and SWIR bands, but cannot open the TIR (Surface Emissivity) bands. I am using ENVI 5.3 - and have tried classic, classic (32-bit) and the standard versions. Each time, I receive an error "Problem: An error was encountered reading from this file. Error: Variable is undefined: GAINS"
Any thoughts on ...
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4 |
2172 |
16 Mar 2016 01:16 PM |
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2 Replies and 5064 Views
Unable to open Landsat 8 downloaded from AWS 5064 2
Started by Deleted User
I have downloaded few scenes of landsat 8 from Amazon Web Services (S3). Datasets are provided in *.TIFF format. When I try to load it in ENVI it asks for header information (Which I believe is that envi is unable to read the format automatically). Though QGIS is able to read this tiff files and once exported from QGIS to tiff then envi reads this files. Is this some kind of bug in dataset format or envi
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5064 |
14 Mar 2016 11:56 PM |
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12 Replies and 5250 Views
Brightness temperature calculation 5250 12
Started by Deleted User
I have mod021km- file. I need the detail instruction about calculation of brightness temperature. I try to do it, but cursor value show very big values from 28000 to 55000. Obviously, surface temperature can not have this values.
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5250 |
13 Mar 2016 02:38 PM |
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4 Replies and 2764 Views
Regression analysis in ENVI 5.2 2764 4
Started by Deleted User
I want to perform Regression analysis using Coefficient of determination (R2) in ENVI 5.2... Im unable to find the tool or procedure. I want to apply it on NDVI images from different dates. How can i achieve that
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4 |
2764 |
10 Mar 2016 09:27 PM |
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1 Replies and 1716 Views
Help with GCPs for Orthorectification 1716 1
Started by Deleted User
Running v5.1, 64-bit. I am a student working on orthorectifying some imagery in order to mosaic them and subsequently perform a change detection analysis of the entire scene. I ran into some complications early on as the images I received from my research coordinator did not come with any GCPs. When I brought this to their attention, however, they sent me a newer mosaic of the same scene with GCPs on the ground. Are there any steps that I can take to 'extract' the GCPs and associate them with th...
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1716 |
25 Feb 2016 11:26 AM |
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2 Replies and 3152 Views
Shape file to ROI in ENVI 5.1: Failed to set property:vertices 3152 2
Started by Deleted User
Hi, I have 3 shape files that are my ROIs which are created based on the ground truth that I collected. Each shape file represents multiple polygons of one type of feature ( forest, agriculture etc.) each. Now I have one raster file(single band). I want to perform some statistical analysis to see the possible relationship. For this I tried to convert shape file to ROI using ENVI 5.1 and it gives me an error "Failed to set Property: Vertices- Must be a 2XN array of numeric data types" C...
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3152 |
24 Feb 2016 07:35 PM |
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2 Replies and 2642 Views
Radiometric Calibration of Cirrus band (Landsat 8) 2642 2
Started by Deleted User
Hello guys,
I'm working with Landsat 8 images, trying to create burn indices and consequently severity classes. As such, part of the procedure is preparing the images, which involves creating cloud masks on both PreFire and PostFire images. Now I know the how to go about with that but the problem lies in trying to calibrate the PostFire Cirrus band image to TOA reflectance. I'm getting the following message: 'RadiometricCalibration Failed: Calibration Processing Failed'. I've successfully done t...
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2642 |
24 Feb 2016 09:13 AM |
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1 Replies and 1579 Views
Image Orthorectification Help 1579 1
Started by Deleted User
Student, Western Washington University, Bellingham, WARunning: ENVI v5.1, 64bitThis is my first post so I apologize if it lacks sufficient detail. If so, please let me know what else is needed in order to accurately address my query.I am working towards creating a raster mosaic from a subset of images of Padilla Bay in Washington State taken during 1997 and 1998, of which there are 64 and 63 orthos, respectively. My first step is to (ideally) orthorectify the images based on a later mosaic made ...
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1579 |
23 Feb 2016 12:13 PM |
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4 Replies and 1434 Views
Feature Extraction with Example Based Classification 1434 4
Started by Deleted User
I tried FE with example based classification. During the creation of example I remember I have assigned some classes to some segments (I suppose polygons) based on my ground truth. I saved the example file (shape file) and later open it with Arc GIS. The attribute says its a point feature. My guess was it has to be polygon. Where is my concept wrong here. Thanks for the support .
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1434 |
22 Feb 2016 07:28 PM |
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3 Replies and 2353 Views
converting ENVI standard to TIFF to use in R 2353 3
Started by Deleted User
Hello,
I need to import images into R in TIFF format to conduct data analyses, but am having trouble converting from ENVI standard to TIFF in ENVI. I open the ENVI standard file in ENVI, go to file and save as and choose TIFF. The file's properties then say it is a TIFF, but I get an error in R, saying that the file is corrupt. What am I doing wrong
Thanks,
Itiya
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3 |
2353 |
17 Feb 2016 05:39 PM |
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1 Replies and 1650 Views
positive and negative contribution in PCA 1650 1
Started by Deleted User
I need to figure out how to interpret the Eigenvector such as which is positive or negative contribution pleasesuch as this an exaple how to select positive or negative Eigenvector Band 1 Band 2 Band 3 Band 1 0.612076 0.597507 0.518024 Band 2 0.730008 -0.175049 -0.660640 Band 3 0.304058 -0.782524 0.543328Thanks in advanceHoshmend
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1650 |
16 Feb 2016 01:48 PM |
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1 Replies and 1619 Views
Image Change Workflow 1619 1
Started by Deleted User
I am trying to process a SAM difference image between two AVIRIS products (same image)-one corrected with FLAASH, one with QUAC using the Image Change Workflow. However, there when the difference image is calculated, there is a misalignment between the images so only a portion of the top corner of the images is calculated.
Both images are spectrally resampled to match bands, confirm BIL, and same projection. Can anyone help me trouble shoot
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1619 |
15 Feb 2016 07:39 PM |