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JPG compresses better and uncompresses faster than ECW

The following comparison method has been applied to three lossless raster maps (urban orthophoto, rural orthophoto and a 8-bpp map): Compress the original image to JPG. Compress the original image to ECW using different compression levels until the resulting ECW file is slightly larger than the JPG file obtained in the previous step (this gives … Continue reading

Madrid 1656

The year 1656 saw the creation in Madrid of -at least- two graphic masterpieces: while Velázquez was doing that, the Portuguese cartographer Pedro Teixeira was doing this (click to enlarge): A superb map of Madrid in the times of the late Spanish Habsburgs. You can download it as a georeferenced (EPSG:25830) ECW file and also … Continue reading