The Survey of India, Tamil Nadu branch, is introducing digital guide maps of City map of Chennai (India) in the form of CDs.
They will be on sale by August-end or September this year. Public may have to get Defence Ministry clearance for which they will be guided by the department. Only vital installations or spots, identified by Defence Ministry will be barred from the digital maps. These maps can be updated. The department has planned to bring out guide maps at 1: 5,000 units scale in digital format. More layers such as population and hydrology could be included. Details of the digital maps are available at Geo-Spatial Data Centre, Survey of India at Thiru Vi Ka Industrial Estate, Guindy.