97,405 research outputs found
Nolli e la visione della città. Rigore ed estetica nella rappresentazione dello spazio urbano
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El HGIS del catastro urbano de Roma (Catastro Pio-Gregoriano, 1818-1824)
No full textThis contribution illustrates the methodology adopted for the construction of a historical GIS of the city of Rome in the nineteenth century, based on cadastral sources. The work integrates historical research based on archival documentation and geographical analysis and has as objective to produce new thematic information about the city. In this context, the informatization of the maps of the urban cadastre of 1819-24 and of the information contained in the cadastral registers has led to the development of an effective database management system based of the geographic location of the data, and the implementation of an analytical tool that allows the study of the physical structure and of the socioeconomic conditions of the city with a very high level of detail
ACCURACY OF 1908 HIGH TO MEDIUM SCALE CARTOGRAPHY OF ROME AND ITS SURROUNDINGS AND RELATED GEOREFERENCING PROBLEMS
No full textPreliminary attempts to georeference maps of early twentieth century made by the Military Geographic Institute (IGM, the Italian geodetic agency) for the city of Rome and its surroundings, reported residual errors larger than errors observed on similar maps. Previous studies carried out on one or two century older maps of the same area, showed similar or even smaller errors (Baiocchi and Lelo 2005). Six sheets of the "City of Rome and its surroundings" map in scale 1:5 000 dated 1908 have been studied. The identified errors can be referred to the different system of geodetic projection and geodetic datum or to the derivation of some details from maps at smaller scale, but in this case historic documents seem to suggest a different explanation. Parameters useful to perform the transformation of the geodetic systems used in historical maps to modern systems are not known; for this reason until now the various attempts of georeferencing maps of this type were based on collimation of points recognizable on modern cartographies such as corners of historical buildings. This method has often given unsatisfactory results; therefore it was decided to proceed by determining the parameters for the transformation of geodetic datum. The history of geodetic systems used in Italy at the beginning of the 20th century is complex and, in the past, this has led some researcher to misinterpretations. For this reason a full explanation of geodetic systems used in Italy in this period is reported below. Since the parameters of the projection used for the maps in our case study are not known for sure, the reprojection was considered the only way for a correct georeferencing
Lelo K., Monni S., Tomassi F. (2019) “Geografia delle disuguaglianze” in Sandrio Medici (cur.), Povera Roma, Left Libri, Roma: 44-47.
No full textLand suitability for waste disposal in metropolitan areas
No full textSite selection for waste disposal is a complex task that should meet the requirements of communities and stakeholders. In this article, three decision support methods (Boolean logic, index overlay and fuzzy gamma) are used to perform land suitability analysis for landfill siting. The study was carried out in one of the biggest metropolitan regions of Italy, with the objective of locating suitable areas for waste disposal. Physical and socio-economic information criteria for site selection were decided by a multidisciplinary group of experts, according to state-of-the-art guidelines, national legislation and local normative on waste management.The geographic information systems (GIS) based models used in this study are easy to apply but require adequate selection of criteria and weights and a careful evaluation of the results. The methodology is arranged in three steps, reflecting the criteria defined by national legislation on waste management: definition of factors that exclude location of landfills or waste treatment plants; classification of the remaining areas in terms of suitability for landfilling; and evaluation of suitable sites in relation to preferential siting factors (such as the presence of quarries or dismissed plants).The results showed that more than 80% of the provincial territory falls within constraint areas and the remaining territory is suitable for waste disposal for 0.72% or 1.93%, according to the model. The larger and most suitable sites are located in peripheral areas of the metropolitan system.The proposed approach represents a low-cost and expeditious alternative to support the spatial decision-making process. © The Author(s) 2014
Suburbs and fragmentation patterns: the case of Rome
No full textThis paper illustrates the fragmentation patterns in the suburban area of Rome, by
comparing two different points of view: the first related to the urban quality and
inhabitants’ social conditions, the second related to the survival of agricultural practices
and natural habitats. The in-depth study of the fragmentation process and its patterns, as
caused by the urban growth of the last twenty years, is combined with a detailed
analysis of the demographic trends and characteristics, and of the socio-economic
indicators, so as to describe levels of pressure and inequities in spatial terms. A further
focus is also given to recent development plans and town-planning policies
implemented by the municipal administration, as well as to its relationships with
landowners and private developers
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