Google has used a new colour-mapping algorithmic technique to make the service, which launched 15 years ago, visually richer. Previously, the colour coding on Maps was largely limited to green and brown, with lightly shaded areas to denote urban centres. For the update, Google has used computer vision to identify natural features from satellite imagery, looking specifically at arid, icy, forested, and mountainous regions. It’s then analysed these features and assigned them a range of colours on the HSV (hue, saturation, value) colour model.Jonathan Chadwick (Daily Mail)