LERC

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File Format
Name LERC
Ontology
Extension(s) .lrc
Released 2010 (Lerc1), 2014 (Lerc2)

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".

Contents

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.

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