Meta Raster Format

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File Format
Name Meta Raster Format
Ontology
Extension(s) .mrf, .ppg, .pjg, .idx
Released ≤2014 (draft), 2016 (v1.0)

Meta Raster Format (MRF) is an image and data storage format designed for fast access to imagery within a georeferenced tile pyramid at discrete resolutions. It was originally developed at NASA's Jet Propulsion Laboratory.

Contents

Format details

It is a composite format, with an image consisting of 3 components:

  1. MRF metadata file in XML format (file extension: .mrf)
  2. MRF data file. This can be a "Pile of PNGs" (file extension: .ppg) or a "Pile of JPEGS" (file extension: .pjg), in which case the data file contains blocks of concatenated images in PNG or JPEG format. Other possible formats include LERC.
  3. MRF index file (file extension: .idx)

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