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1 Replies and 2143 Views
Batch FLAASH using ENVI 2143 1
Started by Deleted User
Hello,
I have numerous images to be conducted FLAASH atmospheric correction. Could I batch them using ENVI
Thank very much!
Yao
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1 |
2143 |
22 Nov 2016 11:27 AM |
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3 Replies and 1912 Views
Measuring Azimuth direction? 1912 3
Started by Deleted User
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,
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3 |
1912 |
21 Nov 2016 08:40 AM |
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16 Replies and 3698 Views
Linear Spectral Unmixing Tutorial 3698 16
Started by Deleted User
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...
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16 |
3698 |
15 Nov 2016 08:28 AM |
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1 Replies and 2058 Views
Image Change Workflow Error 2058 1
Started by Deleted User
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...
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1 |
2058 |
12 Nov 2016 08:58 AM |
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1 Replies and 1859 Views
Bias georeferencing MERIS FR 1859 1
Started by Deleted User
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
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1 |
1859 |
10 Nov 2016 03:16 AM |
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6 Replies and 2506 Views
pseudo projection in radiometric calibration 2506 6
Started by Deleted User
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
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6 |
2506 |
08 Nov 2016 01:07 PM |
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1 Replies and 2222 Views
L7 SLC-Off Mosaic Gap Fill? 2222 1
Started by Deleted User
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...
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1 |
2222 |
04 Nov 2016 09:07 PM |
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1 Replies and 2042 Views
My ROI has been shifted 2042 1
Started by Deleted User
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.
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1 |
2042 |
03 Nov 2016 07:32 PM |
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1 Replies and 2642 Views
Extract Min and Max Data from ALL Raster Cells in Layer Stack 2642 1
Started by Deleted User
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
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1 |
2642 |
02 Nov 2016 04:50 PM |
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4 Replies and 2139 Views
ROI Tool 2139 4
Started by Deleted User
When I open ROI tools, my tools box is blank. Help
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4 |
2139 |
27 Oct 2016 01:43 PM |
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2 Replies and 3563 Views
e.OpenRaster Problem: Unable to open or read MODIS file 3563 2
Started by Deleted User
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...
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2 |
3563 |
26 Oct 2016 12:49 AM |
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4 Replies and 1883 Views
Atmospheric and Geospatial Correction 1883 4
Started by Deleted User
Hello, I am a student working on a project for Craters of the Moon in Utah. We have been provided data from AVIRIS and HyMap and I am suppose to perform an Atmospheric and Geospatial Correction to the data. Once I have processed it then I need to use that data to determine different aspects of the ancient lava that exist there today.
My problem is that I don't know where to begin with processing this data and I'm new to all of this. Can someone walk me through what I need to do to get the dat...
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4 |
1883 |
23 Oct 2016 03:12 PM |
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1 Replies and 1880 Views
grid search 1880 1
Started by Deleted User
Hi,
I am new to SVM. I have to implement grid search along with 10 fold cross validation to find best C and gamma for RBF kernel. How to perform grid search method with k-fold cross-validation in ENVI 5.1 Is there any tool for doing this or we'll have to perform its steps one by one
Please help me.
Thank in advance.
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1 |
1880 |
20 Oct 2016 02:35 AM |
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1 Replies and 1901 Views
image to map registration 1901 1
Started by Deleted User
Hi,
What unit is the RMSE reported in when doing image-to-map registration in ENVI Pixels or meters
Thanks.
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1 |
1901 |
18 Oct 2016 01:32 AM |
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3 Replies and 1643 Views
Saving trained Nerual Net for later use 1643 3
Started by Deleted User
Is there any way to save out a neural net (Classification - Supervised - Neural Net) that has been trained on one image, so that it can be used to classify another similar image
It looks like any time I want to run the Neural Net classification on an image I need to select ROIs from that particular image to be used for the training. If there was some way to train a net using one image, then be able to apply it to other images that would be helpful. Is there any way to do this
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3 |
1643 |
12 Oct 2016 09:12 AM |
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3 Replies and 2128 Views
How to open THEMIS RDR image in ENVI? 2128 3
Started by Deleted User
Hello Sir,
I have downloaded a THEMIS IR RDR tile from PDS Geosciences Node and I tried opening the QUBE file in ENVI 5.1 using the following procedure: File ->Open as -> Binary and fed in the samples,lines and band details and assumed the storage format as BSQ. The dataset did open but its totally black and does not look like a THEMIS image. If you could help me out with my procedure to open the dataset, it would be great. I require it a bit urgently as I need to complete my project within a ...
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3 |
2128 |
11 Oct 2016 09:02 PM |
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5 Replies and 2507 Views
ENVIMosaicRaster reports inconsistent number of bands, GUI runs without error 2507 5
Started by Deleted User
I am trying to mosaic 75 tif images in ENVI 5.3 using the "new" API. When I do this, I receive the following error:
"The input scenes must have the same number of bands"
although it is clear that each file has the same number of bands and all are BSQ. Each image was written using IDL's write_tiff and planarconfig=2
When I try to mosaic the same files using the referenced option from the old gui, the same images mosaic without complaint.
Any ideas
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5 |
2507 |
24 Aug 2016 08:50 AM |
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2 Replies and 1684 Views
ENVI CLI Bug Ignores Different Raster Input 1684 2
Started by Deleted User
I'm trying to script some ENVI behavior using the IDL/ENVI command line tools on IDL Version 8.5.1 (linux x86_64 m64). However, I'm running into some problems that I think are bugs.
I'm using the ENVI GLT and GeoRef tools like such from the IDL/ENVI Command line with the following code extracted from my scripts:
e = ENVI(/HEADLESS)
geo_raster = e.OpenRaster("/path/to/2016-01-26.210054.HonorRancho.Line1-Run1-Segment01-110000-geo.dat")
geo_fid = ENVIRasterToFID(geo_raster)
...
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2 |
1684 |
23 Aug 2016 06:06 PM |
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1 Replies and 2045 Views
importing red edge 2045 1
Started by Deleted User
Hi,
New to ENVI (5.3 64 bit) and am looking for some help regarding micro-sense's red edge.
Couple questions, do the tiffs need to be multi-tiffs before importing
Is there a specific way to import the images for band recognition
While running image registration I receive an error because the GPS header is gone from importing. Its either a. add tie points or b. image must have normal projections.
Thanks for any help!!
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1 |
2045 |
22 Aug 2016 11:06 PM |
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2 Replies and 2079 Views
Remove All Pixels set to a No Data -1 value for finding min/max 2079 2
Started by Deleted User
Hi all,
I'm trying to take a raster, open it, and find the maximums and minimums of its pixel values. When I run http://www.harrisgeospatial.com/docs/enviRasterIterator.html I get the maximum as the correct value, but the tools I use to create the raster set the value for no pixel to be "-1", and "-1", not my lowest true data value, comes up as the minimum.
I've tried modifying it to ignore the -1 value by adding the keyword "data_ignore_value=1.0000" when openin...
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2 |
2079 |
14 Aug 2016 10:57 AM |