The complex Brazilian housing precariousness has its formation grounded in the segregationist historical process of the formation of Brazilian society. Without the proper public interventions, this reality triggered some ills, one of which was social and urban vulnerability, the result of exclusionary urban planning and management policies. And as a Brazilian reality, this tragic situation would not fail to affect the Salvadoran population. The Special Social Interest Zones are a type of zoning that aims to alleviate this social disparity, since it aims to include this population in the right to the city and urban land, provided with equipment and infrastructure. According to a study, this population residing in ZEIS areas in the capital of Bahia reaches the amount of more than half of the population, 58.36% of the total population of the municipality of Salvador is inserted in areas with precarious housing conditions and without land regularization. This situation leads us to a series of questions: how do these people live? What is the context of housing fragility in the city of Salvador where they are inserted? Does the precariousness only extend in these demarcated polygons? Thus, this dissertation proposes to discuss and understand the format of this precariousness in the municipal scenario, with the help of cartography and geospatial data to understand the territory.