LERC
From Just Solve the File Format Problem
LERC (Limited Error Raster Compression), also written Lerc, is a format for compressed raster image data. It was developed by Esri.
It may appear in a file by itself, or as part of MRF format, or be used as a compression method in a format such as GeoTIFF.
There are two major versions, known as "Lerc1" and "Lerc2".
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Identifiers
The OptimizeRasters project[1] suggests that the usual filename extension is .lrc.
Identification
Lerc2: Files start with ASCII "Lerc2 " (note trailing space).
Lerc1: More research needed. Some files start with "CntZImage ".
Specifications
Software
See also Meta Raster Format#Software.
