Data Set Overview
  =================
    Terrain models are a high level product which are derived from the
    XYZ files and the corresponding image files. The terrain models are
    generated by meshing or triangulating the XYZ data based on the
    connectivity implied by the pixel ordering or by a volume based
    surface extraction. The XYZ files can be viewed as a collection of
    point data while the terrain models take this point data and connect
    it into a polygonal surface representation. The original image is
    referenced by the terrain models as a texture map which is used to
    modulate the surface color of the mesh. In this way the terrain
    models can be viewed as a surface reconstruction of the ground near
    the instrument with the mesh data capturing the shape of the surface
    and the original image, applied as a texture map, capturing the
    brightness variations of the surface. Specific terrain model formats
    such as VST, PFB, DEM and others can be viewed as analogous to GIF,
    TIFF or VICAR in image space in that each represents the data
    somewhat differently for slightly different purposes.

    The Performer Binary (PFB) format facilitates the representation of
    a terrain surface as polygons, optimized for use by the RSVP* tool.
    The number of polygons at any one time may vary according to site
    specific features, such as small rocks versus large boulders.


  Processing
  ==========
    Mesh products can contain data from one or more cameras (Pancam,
    Hazcam, and/or Navcam).

    At the end of Mesh processing, two files will be generated:
    a .pfb file, which is a Terrain Mesh product in Performer Binary
    format, and a .ht file, which is Height Map with VICAR label.


  Data
  ====
    3 bands, Performer Binary (PFB), detached label.


  Software
  ========
    The MIPL Mars Program Suite was used to generate these RDRs.


  Media/Format
  ============
    The data set will initially be delivered and kept online.  Upon
    Mission completion, the Hazcam Operations RDRs will be delivered
    to PDS on DVD.

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