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USGS CMG "Gridded/Image Format" Definition

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This explains the usage of gridded and image Gridded Image

  • "Gridded" and "Image" information (as used here) are information that has regularly spaced values.
  • "Gridded" information contains data values.
  • "Image" information contains a representation of values normalized to a range of gray scales (commonly 0 - 255).
  • Gridded information is usually derived from scattered data.
  • Image information is often a direct observation.
  • Gridded information is commonly extracted into a "scattered" form with latitude, longitude, value triplets.
  • Gridded information occurs in the InfoBank as:
    • multibeam -- gridded files containing bathymetry information from a variety of sources.

"There is nothing worse than a brilliant image of a fuzzy concept." -- Ansel Adams

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Page Last Modified: Mon Nov 4 03:37:29 PST 2013  (chd)