The article presents the results obtained from the application of two different kinds of software, Photoplan (Kubit) and Image Master (Topcon), to the photographic rectification used as a graphic support methodology for the technological and building analysis of the Provincial Forum of Tarraco. The study of archaeological structures in a modern urban context often imposes limitations and obstacles of a different nature (space, time, financial resources, etc.). In order to overcome such drawbacks, photographic rectification can be used for the bi-dimensional documentation of archaeological structures, as a tool widely affirmed and accepted in a scientific context. Presently there are several different kinds of software available on the market, so that it is difficult to make a choice among the wide range of possibilities. Nonetheless, the advantages and disadvantages of these kinds of software depend mainly on the specific aims and the particular work context. Hence, the choice of Photoplan or Image Master was based mainly on the evaluation of their respective flexibility and speed in both data collection and data processing, considering the size and the location of the structure of interest. For our purposes, the best solution was to alternate the two kinds of software, as they turned out to be quite complementary.