The app finds the old series and the new series topographical sheet numbers for all locations inside India on three different scales 1. 1 : 1000000 2. 1 : 250000 3. 1 : 50000 and tells whether the sheet is restricted or not (applicable for old SOI series only). The app allows the user to get the location in three different ways. The user will get the topographical sheet number of this location. The Location could be :- 1. User's current location :- When user needs to find the topographical