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Found 8 results

  1. I want to georeference an M3 image (obtained via PDS) in ENVI. I was following "Assigning Map Information to PDS Images in ENVI", posted by Dr June Wang. I was able to perform most of the steps. Yet when the process is complete, it seems that the georeferencing is not correct. I have attached a couple of screenshots from the M3 image I was working with. To check the accuracy of georeferencing, I cross-checked the location from Google Moon and found that there are a lot of discrepancies between the 'georeferenced' M3 image and Google Moon. In the 'Edit Map Information' window, I entered X-pixel and Y-pixel sizes as 140. Please let me know if this is correct. When I cross-checked with Google Moon, the top of the image should have latitude as north and the bottom the image as south (also verified from LOC file of the M3 image). Please help.
  2. Hi, I've come across many workshop presentation papers and research papers in which the processing of CRISM images include 'Spectral Smile Removal' and the entire sequence of Empirical Processing. 1. When we download the TRR3 data, is it already taken care of? Or do we have to follow a certain algorithm to manually apply it? Can you please suggest me how to do it? It is not mentioned in any workshop papers. 2. If we have to manually perform this task, do we have to do it via IDL/MATLAB programming or is it possible to do so in a GUI software (viz CAT, ENVI)? Thank You! Sourabh Shubham Department Of Geology and Geophysics IIT Kharagpur
  3. Al Emran

    CAT 7.3.1 in ENVI 5.4

    Hello, I installed CAT 7.3.1. in ENVI 5.4 as per the instruction. ENVI shows CAT tool neither in menubar nor under Display. An extension toolbox has created named ''cat_menu'' (see attachment). But, this icon doesn't work also! How can I fix this? Thank you,
  4. I wonder if anyone would have a good book recommendation for getting stuck into ENVI+IDL coding with a focus on this type of data? Has anyone self taught with a particularly useful book?
  5. Dan Scholes

    Map Projection for ENVI Users

    Note for ENVI users of map-projected data: Some Geosciences Node hosted map-projected data sets (.IMG files) are not read by ENVI as projected data sets. Using the Geospatial Data Abstraction Library (GDAL) gdal_translate command, users can easily convert most of these data products into GeoTIFF or ENVI file formats which are read by ENVI as projected data. GDAL packages for various computer systems can be found here: https://trac.osgeo.org/gdal/wiki/DownloadingGdalBinaries. The Windows package used in this example is the OSGEO4W 64-bit version. A MacOS X build is available, as well. Download and install a GDAL package that has gdal_translate.exe. gdal_translate.exe runs from the command line. Make the folder that contains gdal_translate.exe your current directoryTo do this, type "cd path" without the quotes into the command line, where "path" is the full path to the folder that contains gdal_translate.exe. gdal_translate.exe is executed with the following syntax: gdal_translate –of outputtype inputfilepath outputfilepath "outputtype" is GTiff for a GeoTiff (.tif) and ENVI for an ENVI file (.dat) Both file paths are the full path to the file. In the case of a file with a detached PDS label, the "inputfilepath" points to the label, not the data file. Open the file as normal in ENVI. Example using OSGeo4W 64-bit (Windows): C:\>cd OSGeo4W64\bin C:\OSGeo4W64\bin>gdal_translate -of GTiff C:\hrsc\h2064_0000_dt4.img C:\hrsc\h2064_0000_dt4.tif Example using GDAL 2.1 Complete (MacOS X): :/ cd Library/Frameworks/GDAL.framework/Programs :Programs ./gdal_translate -of ENVI /Desktop/hrsc/h2064_0000_dt4.img /Desktop/hrsc/h2064_0000_dt4.dat Examples of data sets that benefit from the GDAL translate command: MRO - HiRISE DTM Mars Express - all HRSC, OMEGA DDRGM Odyssey - THEMIS IRGEO2, VGEO1, VGEO2 MGS - MOLA MEGDR, TES TIMAP Additional instructions for specific data sets: Mars Odyssey THEMIS Visible map-projected .CUB files (VGEO1 and VGEO2) have detached PDS labels, but the map-projection data is in the .CUB file, so the "inputfilepath" should be the data file itself. Mars Odyssey THEMIS Infrared map-projected .CUB.gz files (IRGEO2) need to be un-zipped before using gdal_translate. These data are similar to the visible data files in "inputfilepath" syntax (.CUB, not .LBL). More details about the gdal_translate command can be found at http://www.gdal.org/gdal_translate.html.
  6. Susie Slavney

    CRISM Analysis Tool Updates

    The CRISM Analysis Tool (CAT) is a collection of ENVI and IDL procedures for reading, displaying, and analyzing MRO CRISM data. CAT is now available for ENVI versions 4.x and 5.x, for both Unix and Windows systems. See details at http://pds-geosciences.wustl.edu/missions/mro/crism.htm#Tools.
  7. Hello, I'm new to SHARAD data and facing problems viewing the 2D radargrams. I have tried to open them with NASAView but it is only showing me columns of numbers. I tried to open the images with ENVI but even with different combinations of header offset, columns and rows, I am not able to view the radargrams. The browse images are there, but to analyze the images I need to view them in ENVI. Could someone please tell me how I might be able to visualize the radargrams in ENVI? (A sample header file for a SHARAD rdr file would also be very helpful). Thank you! Ranjan
  8. Dear All, As I am working in Planetary Sciences, I use hyperspectral imagery for analysis of spectral characteristics of minerals in extra - terrestrial body. I found that CAT_ENVI extension is useful for such analysis. I did download and tried to install as per the instruction found in http://pds-geosciences.wustl.edu/missions/mro/crism.htm I am using ENVI 4.7 with IDL 7.1 in Windows 7. I added command lines as per given in the user guide. There was no errors while i Installed. But I couldn't find the 'CAT_ENVI' tab in ENVI menu. Can anyone suggest me how to solve this issue. Many thanks in advance. Regards, Mahima.
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