Le site de vulgarisation scientifique de l’Université de Liège. ULg, Université de Liège
Matrix or raster approach

The image corresponds to a matrix composed of pixels, which are so many units of information. The smaller the pixels, the higher the resolution and the greater the geometric precision of the image. In the case of a geographical image, each of these pixels is georeferenced, and it corresponds to precise geographical coordinates.

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