GIS-based Identification of Densification Types

Deng, Yingwen and Gadocha, Sabine and Spitzer, Wolfgang and Prinz, Thomas (2022) GIS-based Identification of Densification Types. Mobility, Knowledge and Innovation Hubs in Urban and Regional Development. Proceedings of REAL CORP 2022, 27th International Conference on Urban Development, Regional Planning and Information Society. pp. 407-416. ISSN 2521-3938

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Due to the prevailing settlement pressure and the increasing demand for living space, land consumption is draining the limited land reserves in the alpine region. From 2018 to 2020, an average of 11.5 hectares of land per day were used in Austria1 . Until 2020, while the population grew by just 10.9 percent, land use in Austria has increased by more than 27 percent since the turn of the millennium2 . As urban sprawl increases, green spaces decrease and are more and more sealed by asphalt and concrete. To avoid the constant exploitation of open and green spaces, promoting higher land-use efficiency by densification within existing settlement areas is pursued as an alternative, more sustainable path of settlement development. It is therefore essential to provide decision-makers, planners, developers, and architects with a detailed overview of the densification potential within current settlement areas. This paper introduces a GIS-supported methodology to facilitate this task. In our research within the Alpine Building Centre – Simulation of Settlement Systems (Zentrum Alpines Bauen), we first developed a GIS-analysis model for the automated identification of theoretical densification potentials on building plot level while taking legal building regulations and local specifications for structural density into account. In a further step, we elaborated a building-related typology for the classification of these potentials, by integrating the geometry and cubature information of the existing building stock and building plots. GIS analysis models were then developed in accordance with this typology to identify and quantify these potentials theoretically, and to model their generalized three-dimensional (3D) shapes. The proposed typology characterises current densification potentials in Salzburg state into four types: building replacement, roof stacking, building extensions, and independent building annexes. As a case study, this analysis was implemented on a test municipality in Salzburg state - Henndorf am Wallersee. Experimental outcomes are visualized in an interactive 3D web map that provides an overview of the result. The outcome data provide important information and a planning basis that support local planners and decision-makers in achieving more sustainable, resource-efficient future settlement development.

Item Type: Article
Uncontrolled Keywords: GIS-analysis, densification potential, densification typology, 3D-web map
Subjects: G Geography. Anthropology. Recreation > G Geography (General)
G Geography. Anthropology. Recreation > GB Physical geography
G Geography. Anthropology. Recreation > GE Environmental Sciences
Depositing User: The CORP Team
Date Deposited: 10 Nov 2022 11:49
Last Modified: 18 Dec 2022 13:51

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