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1 Replies and 4175 Views
Import Ascii ROI file 4175 1
Started by Deleted User
I have an ROI file in ascii format, exported by ENVI. How can I import this back into envi
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1 |
4175 |
14 Mar 2017 03:39 AM |
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8 Replies and 23336 Views
Mosaic Landsat 7 23336 8
Started by Deleted User
Hi,
I have 11 'Landsat 7 ETMSLC on' tiles which overlap each other. I want to make them into a mosaic.
Firstly, if I want to pre-process the cloud cover to reduce it what is the best way to do this, and should I do it individually to each image before or after the mosaic (I have not done a radiometric and atmospheric correction yet - I am not sure if this is necessary).
As a test I have used the 'Seamless Mosaic' tool for my images and it has created white vertical gaps between images within t...
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8 |
23336 |
09 Mar 2017 03:44 AM |
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1 Replies and 2509 Views
ClassificationToVector tool 2509 1
Started by Deleted User
Hi all,
I need to convert a classification output to a vector file using envi api.
First of all, I am studying the workflow using ENVI:
Select the ClassificationToVector post classification tool
Choose the class layer and the class value to convert into shapefile
Save as myshape.evf
Select the Classic EVF to Shapefile tool
Choose as input tje myshape.evf and save as myshape.shp
The shapefile, created with the workflows above, has the following properties:
n polygons, ...
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1 |
2509 |
06 Mar 2017 10:58 AM |
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1 Replies and 2729 Views
How mask a SVM classification output 2729 1
Started by Deleted User
Which is the best way to apply a mask raster to an SVM classification I am using the SVM classification task, ENVI API.
The reason for this question lies in the fact that the task does not take a mask layer as paramater.
Thank you for any suggestion.
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1 |
2729 |
03 Mar 2017 05:22 AM |
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3 Replies and 2427 Views
ENVIMaskRaster does not work 2427 3
Started by Deleted User
I need to create and then apply a raster mask. Here my code:
File = Filepath(inputfile, Root_Dir = root_path)
raster = e.OpenRaster(File)
cloudmask = (raster.GetData(BAND=0) ge 0.2 and raster.GetData(BAND=1) le 285)
output = Filepath(output_file, Root_Dir = output_path)
maskRaster = ENVIRaster(cloudmask, URI=output)
maskRaster.Save
rasterWithMask = ENVIMaskRaster(raster, MaskRaster, /INVERSE)
rasterWithMask.Export, masked_raster, "TIFF"
The maskRaster is created correctly and is di...
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3 |
2427 |
01 Mar 2017 08:04 AM |
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5 Replies and 2566 Views
FLAASH error with MASTER data 2566 5
Started by Deleted User
Hi,
I'm trying to process MASTER multispectral data using FLAASH. I'm using the unknown multispectral sensor type and have a system response function file. I'm only trying to process the swir bands. The image came in calibrated radiance. When I run FLAASH on ENVI 5.2 I get the following error:
Problem: The FLAASH program exited with the following errors:
ACC error: modrd5: Nonfinite numbers in coefficient array coed.
IDL error:
ACC_MODRD5
ACC_KTAEROSOL
ACC_HYPER2
ACC_...
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5 |
2566 |
27 Feb 2017 05:18 PM |
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3 Replies and 2878 Views
SPEAR Vertical Stripe Removal 2878 3
Started by Deleted User
Hello!
I have hyperspectral images from an airborne sensor that I des-stripe using the SPEAR vertical stripe removal tool. For these images it is most effective when there are no pixels included in the mask, so I set those parameters to 0 on the bottom and 100 at the top of the range. However, with some of my images, not all, I end up with bands that have no data - i.e. all pixels are NaN for those bands, even when the original raster has valid data in the same bands.
What is happening he...
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3 |
2878 |
27 Feb 2017 09:03 AM |
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4 Replies and 3454 Views
dem question "RpcOrtho failed: Action failed" 3454 4
Started by Deleted User
I get the error message "RpcOrtho failed: Action failed" when I try to use a particular dem in the RPC Orthorectification Workflow. When I use the default dem or aster, it runs without error. If there some certain format the dem needs to be in How can I find out more about this error, so I can track down the problem
The dem has this mapinfo-
map info = {Geographic Lat/Lon, 1.0000, 1.0000, -149.93536332, -17.45823938, 5.6593862900e-06, 5.6070907577e-06, WGS-84, units=Degrees}coord...
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4 |
3454 |
24 Feb 2017 12:16 PM |
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2 Replies and 2512 Views
Is there bug in ASCII Grid expot? 2512 2
Started by Deleted User
I've got geotiff 20x30 pixels (obtained from ENVI "save as") for which ENVI generated the world file tfw:
0.5
0
0
-0.5
20.25
49.75
So 49.75 is the uper left pixel center value (i.e. according to https://en.wikipedia.org/wiki/World_file)
the tiff file has also geotags (dumped with exiftool):
Pixel Scale : 0.5 0.5 0
Model Tie Point : 0 0 0 20 50 0
Geo Tiff Version : 1.1.0
GT Model Type : Geographic
GT Raster Type : Pixel Is Area
Geographic Type : WGS 84
Geog Line...
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2 |
2512 |
23 Feb 2017 03:36 PM |
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1 Replies and 2894 Views
WV-3 data processing 2894 1
Started by Deleted User
Hi everyone,
I have a SWIR bundles of standard 2A view ready product, worldview-3 data. I have applied radiometric calibration followed by FLAASH to get surface reflectance (using ENVI 5.3). Can anybody assure me whether my methodology is correct or something else I need to do
Thanks in advance
Pankajini
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1 |
2894 |
22 Feb 2017 03:22 AM |
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1 Replies and 3961 Views
empirical line calibration 3961 1
Started by Deleted User
Good afternoon,
I have a coupleof questions regarding the Empirical Line Calibration tool in ENVI 5.3. I amusing the Empirical Line Compute Factors and Correct tool.
Throughout thedialog that being once you run this tool, there are several different optionsthat I do not understand, nor could I find in Help articles online, perhaps Iam just looking in the wrong places but I wanted to ask anyways.
Firstly, somebackground on the dataset that I am using.
It is an RGBdata set collected from a consum...
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1 |
3961 |
13 Feb 2017 02:55 PM |
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1 Replies and 3338 Views
Access to forum with the new portal credential 3338 1
Started by Deleted User
Hi all,
currently I connect and send post in this forum by using email and password to a colleague who no longer works at my company.
When I updated the version to ENVI 5.4 I got a new user-id and a new password that allow me access only to the new Harris Download and License Center portal.
Can I unify the login credentials, or upgrade to the new credentials In fact the email that you can see is not mine.
Thank you
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1 |
3338 |
09 Feb 2017 10:00 AM |
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4 Replies and 2929 Views
FLAASH end-of-input-record error 2929 4
Started by Deleted User
I'm trying to convert a radiance image to reflectance and receive an error from FLAASH shortly after it starts processing. This linked image is the error dialog I get (for some reason, the editor won't let me embed the image):
flaash_error_dialog
In case the link does not work, here is the error dialog text:
ACC error: convert7
IDL error:
End of input record encountered on file unit: 0.
ACC_CONVERT7
ACC_HYPER2
ACC_ACC_EVENT
ENVI_FLAASH_PROCESS_MANAGER
$MAIN$
And here is a l...
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4 |
2929 |
07 Feb 2017 05:44 PM |
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4 |
2920 |
07 Feb 2017 01:03 AM |
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2 Replies and 2682 Views
Thematic Change workflow into ENVI API 2682 2
Started by Deleted User
Hi all,
i am trying to built an ENVI API workflow to reproduce the Thematic Change workflow available in the ENVI's Change Detection toolbox.
Using the Thematic Change toolbox i can set a kernel filter and an Aggregation parameter (how well explained in the tutorial at this link http://www.harrisgeospatial.com/docs/ThematicChangeTutorial.html). I can also save a statistics.txt file, an image file and a vector file.
I am trying to reproduce the same workflow using ENVI API functions and methods,...
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2 |
2682 |
02 Feb 2017 07:38 AM |
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1 Replies and 2284 Views
Wrong values VIs 2284 1
Started by Deleted User
Hello i'm having trouble using the Vegetation Index Calculator, when i use it the min value i get for almost alla index is betwen -9999.000...(min), and the max value 1.000... i'm not sure where is the problem, can anyone hel, thanks.
I have read that the values must be betwen -1 and 1.
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1 |
2284 |
31 Jan 2017 06:04 PM |
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2 Replies and 2311 Views
help for the triangulation interpolation method in landsat_gapfill.sav 2311 2
Started by Deleted User
Hello everybody,
I am new in the forum so let present myself. I am a teacher in one university of China. I do research on methods to fill the data gaps in the ETM imagery. I have try to fill the data gaps in the ETM imagery using landsat_gapfill.sav IDL programming. I want to know the details of the triangulation interpolation method in landsat_gapfill.sav. Anyone could give me some literatures of the triangulation interpolation method in landsat_gapfill.sav. Thank you!
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2 |
2311 |
28 Jan 2017 06:02 AM |
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0 Replies and 2446 Views
the algorithm of landsat_gapfill 2446 0
Started by Deleted User
I'm doing some research on gap-fill algorithm to recover gapping of landsat 7 SLC-off data. Anyone
can give me details of the triangulation interpolation method in the landsat_gapfill.sav thanks.
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0 |
2446 |
27 Jan 2017 04:48 PM |
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1 Replies and 2472 Views
NDVI calculation 2472 1
Started by Deleted User
Hello everybody,
I am new in the forum so let present myself. I am an Engineering student and I am learning the bases of remote sensing. I use Envi 4.7 and in my project I calculated the NDVI values variations of an area between two periods of time using the Band Math. Now the problem is: I need to keep fixed the values of NDVI for some pixels of the second image, while the other pixel have to change their NDVI value according to a proportion. I mean, suppose the pixels that I want to keep fixed...
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1 |
2472 |
24 Jan 2017 01:11 PM |
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1 Replies and 1983 Views
tech. support form cant function properly 1983 1
Started by Deleted User
I have been trying to submit a ticket to request ENVI 5.2 Linux installation files with tech. support form for three days.
The license number field is BROKEN, so I cannot fill in our license properly and then the system keeps asking me to fill in the lic. no.....
Please help.
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1 |
1983 |
23 Jan 2017 02:10 PM |