POS (Position and Orientation System) provides position and attitude information during aerial photography. There must be at least one reference GPS base station for traditional differential GPS (DGPS) positioning, and the establishment of a GPS station would be a very costly and difficult task in some areas. GPS Precise Point Positioning (PPP) has been advanced as a way to avoid the use of the GPS base station. This paper describes the approaches to the processing of an actual aerial photographic data by using both kinds of GPS positioning methods. The final results of the POS-supported aerial triangulation from PPP are compared with those from DGPS solution. The empirical results suggest that the accuracy of POS-supported aerial triangulation from PPP can satisfy the 1∶2 000 topographic map specifications for aerophotogrammetric office operation. It is feasible to process the POS data of ADS40 without a GPS Base Station by using Precise Point Positioning.