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1 Replies and 2312 Views Radiometric calibration of Parrot Sequoia image  2312  1 Started by  Deleted User Hi, I'd like to conduct radiometric calibration of the image captured using Parrot Sequoia. However, there are not gain and offset data of Parrot Sequoia images uploaded on ENVI5.5. Then, Is it possible that conduct radiometric calibration of Parrot Sequoia image using ENVI5.5
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by  MariMJump to last post
26 Jun 2019 05:36 AM
1 Replies and 2388 Views Classification workflow  2388  1 Started by  Deleted User We have many orthographic images that we are using ENVI 5.2 to do supervised classification. They all share many of the same characteristics and are form the same region. We want to do some supervised learning on a few images, but carry over the results and then automate the process. We have far too many images to do them all by hand. We would like to train on a few, automate the process, check some by hand, and add new classification data as needed to resolve mistakes. Any idea how to do this ...
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by  MariMJump to last post
20 Jun 2019 08:00 AM
0 Replies and 4063 Views Surface Energy Balance Algorithm for Land (SEBAL) for Evapotranspiration calculations  4063  0 Started by  Deleted User Jeffrey Snoddy University Of Southern California (USC) Spatial Science Department,, M.S. Table 5. Summary of equipment and software needs for Normalized Difference Vegetation Index (NDVI) equation Equipment/Software Source Application ENVI ENVI Visualization/Analysis/ Data Organization ArcMap ESRI Visualization/Analysis ArcCatalog ESRI Data Organization Sankey www.Sankeymatic.com Mode Flow Charts S3 Amazon Web Services Database Storage Slack Slack.com Team Posting USC Library Se...
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14 Jun 2019 12:46 PM
1 Replies and 3393 Views forrtl severe (37) inconsistent record length, unit 99  3393  1 Started by  Deleted User During the atmospheric correction 'FLAASH', i am getting 'forrtl severe (37) inconsistent record length, unit 99' error. please solve the issue.
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by  Deleted UserJump to last post
06 Jun 2019 10:23 PM
1 Replies and 2294 Views Assessment of DEMs based on GCPs  2294  1 Started by  Deleted User Hello, I have 3 different Digital Elevation Models and GCPs of the same area and I want to assess the accuracy of each DEM based on those GCPs. I want to know the tools that I have to use to do so in ENVI 5.3. I have also a question about how to generate a DEM from stereo images. Thank you,
1 2294
by  Deleted UserJump to last post
06 Jun 2019 10:07 PM
1 Replies and 2468 Views Seamless Mosaic problem  2468  1 Started by  Deleted User I have problem with Seamless Mosaic tool. I would like to save my seamline, But when I try to restore it I get the message: 'The scene names in the vector must match the scene names for the mosaic'. What does it mean. When I have 4 rasters: LAN_2009_001, LAN_2009_002, LAN_2009_003, LAN_2009_004, how should I name my seamline I have tried i.e. LAN_2009_001.shp, but it still doesn't work.
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by  MariMJump to last post
22 May 2019 09:41 AM
1 Replies and 2510 Views Problem by creating a connection graph  2510  1 Started by  Deleted User I made a sample selection in SARscape with SAR data, using a georeferenced shape and D.E.M. In the sample selection the input file was a multilooked .pwr file, so the output is a .pwr file. I have to input the .pwr file because the slc_list file is to small (5 kb) to be cut and because I have to process the images with the multilooking. The problem is that in the next step, the connection graph creation, ENVI tells me that the 20 or more input files has to be slc_list file, but I need to make th...
1 2510
by  MariMJump to last post
20 May 2019 09:07 AM
6 Replies and 2900 Views NNDiffuse Pan Sharpening error  2900  6 Started by  Deleted User I try to do a big model with whole workflow of pre-procesing and I can not connect PanSharpening with Dark Substraction Correction. My model looks like bellow: multispectral rasters -> iterator -> radiometric calibration -> raster statistic -> dark substraction correction ->agregator -> iterator -> NNDiffuse PS -> -> panchromaticl rasters -> iterator -> radiometric calibration -> raster statistic -> dark substraction correction ->agregator -> Extract Element -> NNDiffuse PS -> ->...
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by  Deleted UserJump to last post
17 May 2019 12:47 AM
5 Replies and 5592 Views How compute class stats over a ROI  5592  5 Started by  Deleted User Hi all, I am trying to compute the classes statistics of a classification maps obtained from a masked raster. The masked pixels are No Data. I am interested to compute the percentage of surface classified by each class. The class stats provide a percentage with respect on the total area of the raster, but i need the statistic value only for the not masked area. Here below a briefly description of workflow in ENVI 5.4: Right click on a class Select Compute Class stats Select the mask...
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by  MariMJump to last post
16 May 2019 05:31 AM
1 Replies and 2013 Views the backgroud value of DEM after extraction  2013  1 Started by  Deleted User Hello, I have used the Dem extraction wizard for an Ikonos stereo pair images and I have found out after importing the tif file to Arcgmap that It takes into account the background value in the elevation scale. The value is -999 and I want to know if I can extract the dem without the background values.
1 2013
by  MariMJump to last post
13 May 2019 08:03 AM
4 Replies and 2266 Views Radiometric & atmospheric correction of ASTER_L1T thermal bands  2266  4 Started by  Deleted User Hello, I have performed radiometric and atmospheric correction of ASTER_L1T thermal bands. Firstly, I have performed the radiometric correction and after that the atmospheric. Lastly, I did the emissivity normalization. More specifically, I have insert the images into ENVI 5.3 new UI, and then I performed the corrections (when I performed the radiometric correction I did NOT apply FLAASH). As a result I had 1 image instead of 5 (as my original thermal bands). My question is why I get only 1 ima...
4 2266
by  MariMJump to last post
13 May 2019 07:58 AM
1 Replies and 2169 Views generation of PPI error message in processing sentinel 2 mosaic data  2169  1 Started by  Deleted User I have a layer stack image which i made using the bands of 7, 8a, 11 and 12 of sentinel 2 data where each band is a mosaic of 7 sentinel images. the resolution is 20m. I executed the MNF operation. But when i try to execute PPI it generates an error message of 'an error occurred while attempting to load the data in to memory. Unable to continue. error: end of file encountered. unit 100'. My computer is windows 10 64 bit machine with a 20 GB ram. I want to know the reason for this error messa...
1 2169
by  MariMJump to last post
08 May 2019 01:00 PM
2 Replies and 1624 Views ENVIReprojectGLT MODIS or VIIRS with seperate geo file  1624  2 Started by  Deleted User I'm trying to use the ENVIReprojectGLT task to georeference MODIS or VIIRS data when the geographic rasters are not in the same file as the image raster. I would like to use the new API rather than resort to the old classic api. The example in the documentation has those raster automatically generated with the 'openraster' function when opening an hdf5 file that includes the image data and the geographic data together. I'm not sure how to use the task when that information is coming from se...
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by  Deleted UserJump to last post
07 May 2019 11:14 AM
5 Replies and 4243 Views Replace bad values Error  4243  5 Started by  Deleted User I have set of Landsat 7 images. I need to remove "black lines" from images and i use Remove bad Values tool. Tool works fine on most images but when i try to use it on some of them i get error like: "dem_bad_data_doit: An error has occured during processing Error: "TRIANGULATE: Points are co-linear, no solution" The result may be invalid. What's the problem And how to fix it Why some of images are processed fine and some not They are from same source (https://earthe...
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by  Deleted UserJump to last post
29 Apr 2019 08:09 PM
7 Replies and 2330 Views EO-1 Hyperion Orthorectification  2330  7 Started by  Deleted User Hello, I am want to Orthorectify Hyperion images, what is the best way of doing so Hyperion sensor is not defined in ENVI. Best Regards Mustafa
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by  Deleted UserJump to last post
20 Apr 2019 11:00 AM
1 Replies and 2109 Views Mathematical operation in Raster stack  2109  1 Started by  Deleted User Hi, I have a raster stack of 15 rasters and another stack of the same number of raster layers. Now I want to subtract one layer from another from two stacks. How can I do that quickly ENVI allows me to do calculations only in a single band basis. Is there any way to do operations in a stack quickly Thanks in advance.
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by  MariMJump to last post
18 Apr 2019 10:08 AM
5 Replies and 3344 Views QUAC  3344  5 Started by  Deleted User *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...
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by  MariMJump to last post
01 Apr 2019 10:38 AM
2 Replies and 1487 Views NDVI and Band math  1487  2 Started by  Deleted User Hello all, I have 2 images of the same are taken before and after a natural disaster. I converted them to NDVI images and now I want to see the differences between the 2 NDVI images to see where and how much changes occurred. I know I need to use band math, but not sure how to do it. Can anyone help Thank you
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by  Deleted UserJump to last post
01 Apr 2019 09:19 AM
1 Replies and 2426 Views Extending ENVI with IDL - read .hsi and .hdr files  2426  1 Started by  Deleted User Hi, I have .hsi and .hdr files (hyperspectral images) which I can open and process in ENVI. I tried using IDL and extend ENVI but these files would not be read. Please help me what codes or procedures to perform to achieve this first task. Thanks, Tiffany
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by  MariMJump to last post
01 Apr 2019 07:23 AM
27 Replies and 6608 Views Hyperion Preprocessing  6608  27 Started by  Deleted User
(Topic has multiple pages1 2 )
Can the Vertical stripe removal in the SPEAR tools of ENVI 4.7 be used for hyperion preprocessing and if yes kindly do send me details on how this tool works as the information about this tool is not sufficient in ENVI help.Expecting a reply soon.
27 6608
by  MariMJump to last post
28 Mar 2019 02:35 PM
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