Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.
GEOALT_IA2015 indicates the district in India where the respondent was interviewed. Districts are second administrative level of geography.
Other sample years have their own sample-specific geography variables. There is also an integrated variable, GEO_IA1992_2015, that provides spatially consistent units over time with less geographic detail (states). The first administrative level of geography, states, can be found in GEO_IA2015.
A GIS map for GEOALT_IA2015 (in shapefile format) can be downloaded from the DHS Program Spatial Data Repository [URL omitted from DDI.] Boundaries page.