This article reveals the understanding of informal settlements in Brazil as much as it details the approximate population, the genesis and major impacts on Brazilian society. It also reports, the difficulties faced by local authorities in maintaining cohesive, extensive and above all updated record. Especially taking into account that approximately 17.5% of the population occupies improper locations, according to the formal planning. Because, they are not included in the records dedicated to the territorial organization of the city hall and have more pronounced population density than in cities with urban design. Bringing consequences that exacerbate inequality and the process of social exclusion. In addition, it highlights features of the Airborne Laser Scanner, sensor responsible for laser profiling. Activity contracted by the Municipality of Belo Horizonte, from 2008 coupled with aerophotogrammetric survey that brought a number of advantages including the DEM across the county extension. The study describes a methodology which by treating the laser profiling data with embedded routines in Matlab platform allows the roof eaves registry of buildings in Cluster Cafezal. The author mentions that the strategy when added to the relational database can help to develop an incipient registration.