Format
Enhanced Compression Wavelet
Summary
- Name
- Enhanced Compression Wavelet
- Identifiers
- PUID: fmt/371
- Format type
- Image (Raster)
- Description
- ECW (Enhanced Compression Wavelet) is a proprietary wavelet compression image format optimized for geospatial imagery, which can quickly compress and decompress huge images, especially aerial and satellite imagery. It was developed by Earth Resource Mapping, and is now owned by ERDAS, which is owned by Leica Geosystems. The requirement of using the ECWP format for any application is that it requires the user to download and install enabling software in the form of a plug-in or in the case of the Java applet, a Java runtime environment (JRE).
- Format encoding
- Text
- File extensions
-
ecw - Submitted by
- Digital Preservation Department / The National Archives
- Developed by
- Earth Resource Mapping, Inc. / Earth Resource Mapping, Inc.
Internal signatures
Enhanced Compression Wavelet
- Description
- Regularly recurring header sequence
- Provenance
- Ongoing DROID research
Byte sequences
- Min Frag Length
- Absolute from BOF
- Offset
- 0
- Max offset
- None
- Byte Sequence
65020102{1}0400(00|01|02|06){2}00(00|02|03|04|06){2}00030001- Endianness
- None
Changelog
-
V105
- Release date
- 29 June 2022
-
Updated
Enhanced Compression Wavelet: Widened signature to account for variations in files found by enquirier. Submitted by The National Library of Australia.
-
V55
- Release date
- 4 January 2012
-
Added format
Enhanced Compression Wavelet: Partial entry added. Submission from the Geospatial Multistate Access and Preservation Partnership (GeoMAPP).
-
Added signature
Enhanced Compression Wavelet: Signature developed through PRONOM Research.