D. G. Rossiter
GIS India 7(3) October 1998.
Copyright © GIS India
It is possible to create seamless digital maps from Survey of India topographic sheets, by separately georeferencing each N-S strip of sheets which share the same projection to a separate metric grid, back-projecting from the separate metric grids to geographic coordinates on the Everest 1956 elipsoid, and then joining the strips. This method can also combine maps from different scales. The procedure is explained in detail using Arc/Info terminology, and outlined for ILWIS 2.1 for Windows.
Last modified: Tue Apr 5 05:57:57 EDT 2016 URL: http://www.css.cornell.edu/faculty/dgr2/pubs/gisndia.htm