This article introduces and illustrates the use of geographic informat
ion systems for practice, administration, and research in the social s
ervices. Our illustrations use 1996/97 child cave licensing data for t
he Lowell/Framingham area of Massachusetts and resource and referral d
ata from the Dade County/Greater Miami area of Florida. The article sh
ows how the location and characteristics of service providers can be d
epicted on a map that can be made available to clients. With the mappi
ng of the ratio of child cave slots to the number of children in the p
opulation, social services agency workers can locate areas with potent
ial service-availability gaps. By mapping the take-up rate for child c
ave subsidies, agencies can identify areas for potential client outrea
ch. Finally the article presents a map of the ''daily schlep'' for poo
r families in one area of Miami. This map suggests that the transporta
tion problem of the poor is primarily a work transportation problem an
d not a child care transportation issue and provides support for the h
ypothesis of a spatial mismatch between home and jobs for poor familie
s.