Complementary use of remote-sensing techniques gives a clearer and more reliable look at archaeological patterns than based solely on surface observations. One of the traditional methods is field surveying of two main types: extensive and intensive. An extensive field survey is very helpful in locating new sites, estimating its size, quantity and quality of finds, its chronology, and state of preservation. An intensive field survey is a more detailed method focused on the spatial dispertion of finds (see metal detectors survey).
The vicinity of the legionary camp has been investigated by extensive field surveying by a Bulgarian-German expedition (Conrad, Stančev 2002). The vicus at Ostrite Mogili has been explored in 1977 and 2000 (Sarnowski 1979; Tomas 2006).
The canabae were investigated in this way in 2012 and 2013. The first attempt was focused on the verification of its size, which was not an easy task due to the presence of the summer houses in the area. The GPS hand-held devices were helpful in marking the border points of the site.
The settlement in Ostrite Mogili was verified in 2013. The aim of the prospection was to estimate the size of the site and its easternmost borders. Further investigations in the canbae were made, with special attention of the area placed to the south-east and south from the fortress.