http://fileformats.archiveteam.org/index.php?title=LERC&feed=atom&action=historyLERC - Revision history2024-03-29T09:23:11ZRevision history for this page on the wikiMediaWiki 1.19.2http://fileformats.archiveteam.org/index.php?title=LERC&diff=38571&oldid=prevJsummers: Created page with "{{FormatInfo |formattype=electronic |subcat=Graphics |extensions={{ext|lrc}} |released=2010 (Lerc1), 2014 (Lerc2) }} '''LERC''' (Limited Error Raster Compression), also writte..."2020-11-16T14:12:07Z<p>Created page with "{{FormatInfo |formattype=electronic |subcat=Graphics |extensions={{ext|lrc}} |released=2010 (Lerc1), 2014 (Lerc2) }} '''LERC''' (Limited Error Raster Compression), also writte..."</p>
<p><b>New page</b></p><div>{{FormatInfo<br />
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'''LERC''' (Limited Error Raster Compression), also written '''Lerc''', is a format for compressed raster image data. It was developed by [[ESRI|Esri]].<br />
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It may appear in a file by itself, or as part of [[Meta Raster Format|MRF]] format, or be used as a compression method in a format such as [[GeoTIFF]].<br />
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There are two major versions, known as "Lerc1" and "Lerc2".<br />
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== Identifiers ==<br />
The OptimizeRasters project[https://github.com/Esri/OptimizeRasters/] suggests that the usual filename extension is '''.lrc'''.<br />
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== Identification ==<br />
Lerc2: Files start with ASCII "{{magic|Lerc2&nbsp;}}" (note trailing space).<br />
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Lerc1: More research needed. Some files start with "{{magic|CntZImage&nbsp;}}".<br />
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== Specifications ==<br />
* [https://github.com/Esri/lerc/blob/master/doc/Lerc_ByteStream_Specification.pdf LERC Byte Stream Specification]<br />
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== Software ==<br />
* [https://github.com/Esri/lerc Source code at GitHub]<br />
See also [[Meta Raster Format#Software]].<br />
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== Links ==<br />
* [https://esri.github.io/lerc/ LERC - Limited Error Raster Compression]<br />
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[[Category:Geospatial]]<br />
[[Category:Compression]]<br />
[[Category:Esri]]</div>Jsummers