liblerc ☆

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Description:
Ersi LERC library (Limited Error Raster Compression)

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | @Esri | formulae.brew.sh

Category: Developer tools

Tags: compression geospatial raster gis library

Install: brew install liblerc

About:
Liblerc is the official C++ library from Esri implementing the LERC (Limited Error Raster Compression) algorithm. It provides lossy and lossless compression for raster data, specifically designed for floating-point and 16-bit integer grids. Its main value proposition is achieving very high compression ratios with fast encoding/decoding speeds while allowing strict, user-defined error bounds.

Key Features:

Extremely fast compression and decompression speeds
Configurable error bounds for lossy compression
Support for various data types including Byte, Short, and Float
Simple C++ API and minimal dependencies

Use Cases:

Compressing large elevation and DEM datasets for storage and transfer
Streaming raster data in web and mobile GIS applications
Reducing storage costs for cloud-based geospatial data archives

Alternatives:

GDAL – GDAL is a comprehensive translator library that supports LERC and many other formats, whereas Liblerc is the focused, lightweight core implementation of the algorithm itself.

Version History

Detected	Version	Rev	Change	Commit
Sep 10, 2025 8:13am		0	VERSION_BUMP	bb8bf216