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Urban Development and Greenspace: A Case Study of Parcel Level Spatial Distribution and Supply- Demand Scenario in Austin

Authors: Raihan Jamil*, Texas State University , Jason Julian, Professor, Texas State University
Topics: Urban Geography, Landscape, Geographic Information Science and Systems
Keywords: Urban Greenspace, Neighborhood Level, Parks and Protected Place, Austin
Session Type: Poster
Day: 4/9/2020
Start / End Time: 11:10 AM / 12:25 PM
Room: Virtual Track 2
Presentation File: No File Uploaded

With increasing urban populations, concerns about quality of life and human health and well-being have increased. With this, the interest in the potential and actual benefits of urban green spaces of all kinds – now widely referred to as urban green infrastructure – has grown. However, city-wide green-space modelling approaches often underestimate green-space within neighborhood areas, or even omit private gardens from such analysis. Parcel level garden areal extents are significant and improved estimations of garden green-space abundance are required to improve urban green-space analysis. Our research project focused on block/ parcel level Spatial distribution of urban green-space in physical and social perspective. We have used high resolution satellite imagery from National Agriculture Imagery Program (NAIP) to identify connectivity and distribution of neighborhood level urban Green-space. A function called focalmean was used to measure percent of each land cover type around central focal points in a neighborhood at three different buffer sizes. We have used contagion index (CONTAG) and measured landscape heterogeneity and also described the extent to which landscapes are aggregated or clumped. The contagion index is low in part of the study area which revealed that the landscape is dominated by a relatively large number of small or highly fragmented patches. Finally, Neighborhood patches were defined by grouping contiguous pixels of greenspace using a 4-neighbor rule, in which two greenspace pixels are considered to be in the same patch only if they are touching in the horizontal or vertical direction.

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