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Output Navigation Function (out_nav or out, /nav)

Description:  The Output Navigation Function provides the capability of outputting the latitude/longitude values of any navigable data type.  Output can be in either of the two following formats:

Output Format Notes:
  • Binary Flat File:  In the case of outputting a binary flat file, the output data type will be single-precision floating point.  By default, the latitude array will be written out first, followed by the longitude array.  If interlacing is specified, then for each point in the grid, the latitude value will be written followed by the longitude value.
  • HDF SD:  In the case of outputting either the  HDF SD format, by default two SD's will be added to the HDF file specified:  an SD called 'Latitude' and and SD called 'Longitude'.  Both of these SD's will have the same dimensions as the band or band region specified.


    • [Interactive Mode][Command Mode]

    Interactive Mode:
     

    Description:  The Navigation option of the Output Setup Widget provides the capability of outputting the latitude and longitude values associated with either the loaded band or displayed window number specified.  A region within this loaded band or window can also be specified.  This widget is activated  by selecting the Functions->Output->Navigation option from either the Display Window Widget or the Main Widget.  If the Output Setup Widget is already activated, this option can be viewed by selecting Type->Navigation.


    Output Source Section:
    Type Navigation Data
    Band No. Select this option if you are interested in outputting navigation from a band which has been loaded and is listed in the Band List Selection Widget.  Enter the band number in the provided text entry.
    Window No. Select this option if you are interested in outputting the navigation from a display window.  Enter the window number in the provided text entry.
    Band or Window No. Entry  Enter the band number or window number corresponding to the source of the desired navigation.

    Options for All Output File Types Section:

    Input Items :
    Output File Name It is not necessary to input an output file name.  If left blank, an intelligent default will be created.  For the binary flat file output, the default output filename will contain the data type, i.e. 'test_nav_248x1104_2i.flat' for short integer, 'test_nav_248x1104_4f.flat' for single-precision floating point.
    Output File Mode Action to take if output HDF file already exists.  (for HDF output file type only) 
     
    New Remove the existing HDF file before creating a new file. (Default)
    Append Append output SDs to the existing HDF file.
    Window This option only applies when Window No. is specified as the data source.  The window to output for the selected frame buffer.  The options are:
     
    Main (entire) The main full resolution display window.
    Main (viewable) The viewable portion of the full resolution display window.
    Roam The roam window.
    Zoom The zoom window.
    Region The region for output within the window specified.
     
    Start col The starting column in the window specified (relative to 1).
    End col The ending column in the window specified (relative to 1).
    Start row The starting row in the window specified (relative to 1).
    End row The ending row in the window specified (relative to 1).
    File Type The graphics data output file type.  The options are:
     
    Binary Flat File  The data type is single-precision floating point.  The latitude array will be written out, followed by the longitude array.
    HDF SD Two SD's will be added to the HDF file specified: 'Latitude' and 'Longitude'.
    Go Output the selected window.
    Help Show this HTML file in local HTML viewer.
    Quit Destroy the Output Setup Widget.

    Options for HDF SD Section:
    SD name for Latitude The name of the Scientific Dataset containing the 2D latitude array.  The name can contain blanks. (Default is "Latitude ".)
    SD name for Longitude The name of the Scientific Dataset containing the 2D longitude array.  The name can contain blanks. (Default is "Longitude ".)


    Options for FlatFile Output Navigation Section:
    No Interlace  Do not interlace latitude/longitude values by pixels.  Output the entire latitude array, followed by the entire longitude array.
    Interlace Interlace the latitude and longitude values by pixels.  For each pixel value, output the corresponding latitude value, followed by the longitude value.

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    Authorized by: gene carl feldman

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    Updated: Monday, 15-Dec-2008 16:03:12 EST