We use aerial photography in cartography, land-use #planning, archaeology, movie production, environmental studies, power line #inspection, #surveillance, #conveyancing, and 3D #Mapping etc. An example of how we use aerial photography in the field of Project Planning is the mapping project done at the site of Assam. With the development of new generation large format digital aerial cameras, it is possible to capture a project area with resolution up to 25 mm (2.5 cm), suitable for engineering survey type projects. Despite the fact that very large amount of data has to be acquired, large format aerial cameras can capture larger frames than ever before which implies less runs are needed to map an area. Aerial imagery resolution typically ranges from 90 cm at the coarse end up to an impressive 2.5 cm with a large demand in the range 15 cm to 10 cm.