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Format

Reduced Resolution Dataset

Download XML

Summary

Name
Reduced Resolution Dataset
Identifiers
PUID: fmt/1215
Format type
GIS
Description
The ERDAS HFA format defines a heirachichal data structure used by many formats primarily associated with with the ERDAS Imagine software package for processing geospatial imagery. Other formats use this structure also, notably ArcGIS 'Reduced resolution datasets' and their auxilliary files. It may be possible to distinguish between distinct subsets of HFA with further research. Please contact the PRONOM team if you can assist with this.
File extensions
img, ovr, rrd, aux, aoi, cff, fft, gcc, sig, sml
Source
National Library of Australia / National Library of Australia

Internal signatures

Reduced Resolution Dataset

Note
BOF: 'EHFA_HEADER_TAG', 0x00

Byte sequences

Min Frag Length
Absolute from BOF
Offset
0
Max offset
0
Byte Sequence
454846415F4845414445525F54414700
Endianness
None

Changelog

  • Added in V110

    Release date
    14 March 2023

    ERDAS Hierarchical File Architecture Format/Reduced Resolution Dataset: Name of sig and internal sig changed to Reduced Resolution Dataset, to refect the fact that this file is not just ERDAS. Submitted by The National Library of Australia.

    ERDAS Hierarchical File Architecture Format/Reduced Resolution Dataset: Signature researched and samples provided by The National Library of Australia.

  • Added in V94

    Release date
    17 September 2018

    ERDAS Hierarchical File Architecture Format: Signature developed through PRONOM Research. Submitted by National Library of Australia.

    ERDAS Hierarchical File Architecture Format: Full entry added. Submitted by National Library of Australia.