Format
Reduced Resolution Dataset
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 - Submitted by
- National Library of Australia / National Library of Australia
Internal signatures
Reduced Resolution Dataset
- Description
- BOF: 'EHFA_HEADER_TAG', 0x00
Byte sequences
- Min Frag Length
- Absolute from BOF
- Offset
- 0
- Max offset
- 0
- Byte Sequence
454846415F4845414445525F54414700- Endianness
- None
Changelog
-
V110
- Release date
- 14 March 2023
-
Added signature
ERDAS Hierarchical File Architecture Format/Reduced Resolution Dataset: Signature researched and samples provided by The National Library of Australia.
-
Updated
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.
-
V94
- Release date
- 17 September 2018
-
Added format
ERDAS Hierarchical File Architecture Format: Full entry added. Submitted by National Library of Australia.
-
Added signature
ERDAS Hierarchical File Architecture Format: Signature developed through PRONOM Research. Submitted by National Library of Australia.