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PDS Geosciences Node Community
  1. PDS Geosciences Node

    1. Announcements

      The latest news from the Geosciences Node

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    2. For data providers

      Discussions pertaining to preparing data for archiving with PDS

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    3. For data users

      Questions and comments related to locating, accessing, and using PDS Geo data

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  2. PDS Geo Tools

    1. Analyst's Notebook

      Posts relating to the Analyst's Notebook

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    2. ODE - Orbital Data Explorer

      Posts related to the Orbital Data Explorer

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    4. Spectral Library

      Posts relating to the PDS Geosciences Node Spectral Library

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  3. Workshops

    1. MRO/CRISM Data Users' Workshop 2012

      Posts relating to the 2012 MRO/CRISM Data Users' Workshop.

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  • Recent Topics

    • January 10, 2020 – MRO HiRISE Updates - MRO HiRISE EDR, RDR, DTM and Anaglyph data products released through December 3, 2019 (Orbit 62,599) See https://wufs.wustl.edu/ode/odeholdings/Mars_holdings.html  
    • Did you try to use ENVI mask or band calculation to filter out the black pixels? If you like, you can upload the CRISM output together with the ENVI header online. I can have a try of your data. Thanks, June
    • I mean the black pixels which ENVI don't process for certain band selections custom stretched:   I want to "substract" only the painted shapes to put that over a CTX image, so the black part of this image would be the CTX image detailed surface or a DTM. Thank you, Wladimir
    • Do you mean the black pixels along the edge of the image, which represent no data? If that is the "black pixels" you want to clean, in ArcGIS, when you overlain the CRISM output onto a DTM,  right click the image, and choose properties. Below is the instruction to remove the background area of a raster layer using the Unique Values renderer in ArcMap. Arcscene has similar function to set the background color as transparent. Or you can google an example. I cannot use ArcGIS desktop these days due to a university license issue. People are still working on that. If you still have problem, I can send you a pic example as soon as I can access my ArcGIS desktop again. Thanks,  https://desktop.arcgis.com/en/arcmap/10.3/manage-data/raster-and-images/removing-the-background-using-the-unique-values-renderer.htm June
    • Thank you so much for your support June, now I can picture more clearly the general panorama. A remaining question would be about the process of create a "layer" from the CRISM image (using a browse product?) with only the "painted" pixels which represents the main mineralogy from a particular scene, as the maps who I've attached on the previous answer. Is there an automatized method to do is or maybe I should use a photo edition software to clean the images from the "black pixels" and create a layer with only the "colorized pixels"? Thanks, Wladimir
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