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Concern for improving the urban slum in the cities of Venezuela has led the National Housing Council (CONAVI) and the Foundation for Community Development (FUNDACOMUN) to design a national improvement urban policy * include reinforcement of the formal and social organizational patterns within the urban area and conservation of the built environment. In general, the urban design proposals were designed to pursue balancing the quality of life. In general, the urban design proposals were designed to pursue balancing the quality of life. Identifying and analyzing these relationships was one of the main tasks resolved with GIS technology. ( * Some of the urban design policy issues concern Petare, a marginal area within the capital city of Caracas). Introduction

Existing Settlement Conditions The informal occupation of the urban periphery in Venezuela generates different situations in: urban scenes, density, and availability of land for urban development are key for creating urban proposals. All informal urban periphery settlements in Venezuela tend to possess similar characteristics which include the absence of a defined urban structure, discontinuous internal urban patterns, and a deficit of public services and infrastructure.

Site Analysis as a Basis for Identifying Sustainability Petare is a highly populated neighborhood with an area 87 hectares in Caracas. It is characterized by an extensive residential fabric. It is located on a hillside with irregular topography and steep slopes, equaling a 40 percent grade, and consists of a discontinuous street pattern. Identifying building typologies in highly concentrated developments, but Petare, with its location and its density ( inhabitants per hectare) did not allow for the classical definition of residential typologies, so the analysis focused on using aggregation typologies.

Types were identified as individual units or groups of units which classified and assigned a typology according to the form in which the units aggregated by creating various maps that identified more specific categories like division to hard and soft areas : - Hard areas that are difficult to change because they are strongly built and interwoven. - Hard areas that are difficult to change because they are strongly built and interwoven. - Soft areas are not well structured, lack a block definition, and allow changes that provide urban order and social cohesion. - Soft areas are not well structured, lack a block definition, and allow changes that provide urban order and social cohesion. A synthesis map that displayed the feasibility for urban intervention was developed to trace access roads. Grades of feasibility for urban intervention were established using the 10 combinations of hard and soft areas and grouping them to obtain four grades of feasibility: soft and accessible, soft and inaccessible, hard and accessible, and hard and inaccessible.

For draw this map, it was created by :revealed problems by meetings with community leaders and groups and the list of problems and aspirations of the community In Petare, this map was created by overlaying the layers of hard and soft areas plus using accessibility and proximity maps developed with ArcView Spatial Analyst. The search for solutions to infrastructural problems was a priority for the communities, since they felt these solutions would improve the quality of their public spaces.

Proposal Criteria The proposal created from the analyzed data proved that the communities could look at developing while respecting the neighborhood's characteristics by creating the Implementation Model and Building Guidelines. The social aspects of the model were supported in an urban proposal, which reaffirmed the community system of relationships and the social cohesion of the different neighborhood groups. In Petare the lack of urban land for locating new facilities was overcome by proposing horizontal extensions of very small dimensions and vertical growth of existing educational and health facilities. Open space for public was a product of interventions when this recovered, housing or community facilities were proposed and the pedestrian system of stairs and sidewalks was improved

This analysis required acquiring a lot of data about the dwellings; the people like : - their needs and capabilities. - their needs and capabilities. - their built environment. - their built environment. - the area's physical conditions. - the area's physical conditions. - residents' behavior. - residents' behavior. Using GIS was the best way to work with this geospatial data. Arc View Spatial Analyst was used throughout the entire urban analysis and design process.