India - Housing Condition and Migration Survey: NSS 49th Round, Schedule 1.2, January - June 1993 

Information on the type of area in which the building housing the sample household is located will be recorded against this item in terms of codes. 4.4.3 To collect this information, part from the informant belonging to the sample household, some knowledgeable persons of the locality may have to be contacted. For a household living under a tree or bridge, in a pipe, or on a footpath without a structure etc.code 1 will be recorded and item 2 to 15 of this block will be left bland.
Some times an area develops into an unauthorised settlement with unauthorised structures put up by `squatters . such an area, if not categorised as a slum area, will be considered as a ` “squatter settlement” and buildings in such an area will get code 2 for item 1. If the building is situated in a slum area, then code 4 will be recorded if the area is declared as a slum by the municipality or other appropriate authorities and otherwise code 3 will be recorded. For all other areas code 5 will be recorded against this item. ( for definition of slum area see para 2.0.12. )