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Chapter 5. libral

5.1. libral rasters
5.2. Raster algorithms in libral
5.3. Rendering of geospatial data in libral
The libral raster library serves three purposes in Geoinformatica. First, it is a simple and fast library for in-memory raster math. Second, it is a platform for implementing some geospatial raster algorithms. Third, it contains code for rendering geospatial data (libral-rasters and OGR vector data) on pixel buffers.

5.1. libral rasters

libral raster is a two-dimensional table of cells. A cell is a square area in map coordinates, which contains either a RAL_INTEGER or a RAL_REAL.