With the recent developments in the technology of optical digital sensors, the use of professional digital frame cameras emerged as an alternative for aerial photogrammetric applications. The main reasons are their flexibility and cost effectiveness, when compared to film cameras and high-end digital systems. There are some models of cameras with 50, 60 and 80 megapixels, which provide ground coverage near to photogrammetric film cameras. These cameras can also be integrated to GPS/INS systems, with specially designed mechanic mounts and electronics devices that can control all components of the aerial mapping system. Several custom designed systems have been used worldwide with suitable results for mapping applications. This paper presents the results obtained with SAAPI system in two huge projects: the digital mapping of Bahia State (600.000 km2 with a GSD of 80 cm) and Santa Catarina State (97.000 km2 with a GSD of 39 cm), both in Brazil. In order to assess the geometric accuracy of this mapping system some results obtained with SAAPI in these projects are presented, using INPHO-MATCH-T for DTM generation. The experiments were carried out to assess the accuracy achieved in the object space coordinates when considering self calibrating bundle adjustment with direct georeferencing. Moreover, orthophotos, DSM and DTM products were generated and analysed. It was verified that suitable accuracy was achieved, aorund 1 to 1.5 GSD in the final products.