LERC

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".

Identifiers
The OptimizeRasters project suggests that the usual filename extension is .lrc.

Identification
Lerc2: Files start with ASCII "" (note trailing space).

Lerc1: More research needed. Some files start with "".

Specifications

 * LERC Byte Stream Specification

Software
See also Meta Raster Format.
 * Source code at GitHub

Links

 * LERC - Limited Error Raster Compression