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US-IALE 2018 has ended

Monday, April 9 • 4:45pm - 5:00pm
SYMPOSIA-07: Using LiDAR and Immersive Geovisualization to Develop and Validate Viewscape Models for Urban Landscape

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AUTHORS: Payam Tabrizian, Perver Baran, Helena Mitasova, Ross K. Meentemeyer – Center for Geospatial Analytics, North Carolina State University

ABSTRACT: Viewscape modeling- a process of defining, parsing and analysis of landscape visual space’s structure within GIS- has been commonly used in applications ranging from landscape planning and ecosystem services assessment to geography and archaeology. While viewscape models have been increasingly used to assess landscape visual characteristics across continental, regional, and landscape scales, their application for modeling perceptions in urban environments, particularly at the site scale, remains surprisingly unexplored. Modeling urban environments however, require incorporation of fine-grained landscape structure (eg., vegetation) and patterns (e.g, landcover) that are typically omitted from visibility calculations or unrealistically simulated leading to significant error in predicting visual attributes.This poster demonstrate a multi-method approach for modeling viewscapes for urban environments using LiDAR data and Immersive Geovisualization. We develop a viewscape model for an urban park based on a high-resolution LiDAR sourced DSM with improved vegetation visibility and a detailed landcover obtained from high-resolution multi-spectral imagery. We compare the model output with human subject’s assessment of photorealistic immersive panoramas captured from candidate location across study area to assess the capacity of the viewscape model to predict visual characteristics.The regression results overall indicated good explanatory power for the viewscape model. The models explained 64% of variation in perceived Visual access, 62% for perceieved naturalness, and 42% for percieved complexity. Urban viewscape models can be potentially usefull tools for understanding landscape aestethic values and visual characteristic, and for developing decision support tools for landscape planning. Our method can be used to acquire spatially explicit perception maps for the areas to safeguard for public enjoyment and recreation, and for minimizing the aesthetic impacts of development (e.g, buildings, wind turbines).

Monday April 9, 2018 4:45pm - 5:00pm
LaSalle 1 (7th Floor)

Attendees (9)