In this paper we present a suggestion for a next generation mobile GIS architecture. The proposed architecture enables to use GIS data also in mobile devices and to handle information received from local sensors. The architecture has been used to design CENTRIA Locawe platform, which has been tested in several field experiments. This platform has been used in various industrial pilots and prototypes, which have proven that Locawe platform can be used efficiently in developing location-aware services for both in outdoor as well as indoor environments.