Fox Glacier, in the southern alps of New Zealand, is the object of this thesis. It is located in the Westland Tai Poutini National Park., in the Western Coast of New Zealand. This glacier is the third largest glacier out of 3100 glaciers situated in the Southern Alps of New Zealand (Chinn 2001). The surface velocity was investigated on the lower part of Fox Glacier and compared with previous literature. In this thesis, 15 pairs of satellite imagery are used to find the surface velocity of the ablation zone of the fox glacier using satellite images (Sentinel 2 and Landsat 8).