GIS

Search tools
India Place Finder
India Place Finder, Version I (rural areas), Version II (urban areas) was launched in March 2016 with the entry of urban areas in southern India and completed in March 2018.
Global Place Finder
Historical Maps of Asia
Use this tool to search for historical maps of Asia. See here for details.
Free GIS Software
・ QGIS
https://www.qgis.org/en/site/forusers/download.html
Collected GIS-related Data
# Data Period Source Description
2001 census PCA data and base maps 2001 census and later ML Infomap 2001 census polygons, sub-districts, districts, state-level boundary lines, major roads, railroads, etc.
1:50,000 map with region names Around 1947 and later Swift Survey of India topographical map with region names
1:50,000 map with region names To around 1945 Pasco SOI topographical map acquired from University of Chicago with region names entered
4 Postal codes by latitude and longitude As of Aug 2010 GeoPostcodes  
5 Reddimangudi
land register map
1898, 1924, 1982   Land register map with boundary lines
6 Scanned image of Chinglput Taluk map 1960s?    
7 Other map images Up to around 1945 University of Chicago, etc.  
Free GIS Data
# Data Source URL
1:250,000 map image University of Texas http://www.lib.utexas.edu/maps/ams/india/
GADM database of Global Administrative Areas GADM http://www.gadm.org/
Space shuttle-land elevation data
Version2_1
NASA, USGS http://dds.cr.usgs.gov/srtm/