2014
DOI: 10.1080/13658816.2014.880168
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A visualization-oriented 3D method for efficient computation of urban solar radiation based on 3D–2D surface mapping

Abstract: The temporal and spatial distribution of solar energy in urban areas is highly variable because of the complex building structures present. Traditional GIS-based solar radiation models rely on two-dimensional (2D) digital elevation models to calculate insolation, without considering building facades and complicated three-dimensional (3D) shading effects. Inspired by the 'texture baking' technique used in computer graphics, we propose a full 3D method for computing and visualizing urban solar radiation based on… Show more

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Cited by 55 publications
(41 citation statements)
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“…3D city models provide geometric information such as the tilt, orientation and area of the roof, which are used as the main input for the solar empirical models [84]. Recent work has focused on extending the task for vertical façades, and taking into account the material of the receiving surface [106,107] (Figure 3). This application may benefit from attributes such as the address and type of building for additional analyses [108], and it is being supported by an increasing number of software implementations [109,110].…”
Section: Estimation Of the Solar Irradiationmentioning
confidence: 99%
“…3D city models provide geometric information such as the tilt, orientation and area of the roof, which are used as the main input for the solar empirical models [84]. Recent work has focused on extending the task for vertical façades, and taking into account the material of the receiving surface [106,107] (Figure 3). This application may benefit from attributes such as the address and type of building for additional analyses [108], and it is being supported by an increasing number of software implementations [109,110].…”
Section: Estimation Of the Solar Irradiationmentioning
confidence: 99%
“…The r.sun-based 3D models of Hofierka and Zlocha [16] and Liang et al [15] did not explicitly account for the sky obstruction-caused diffuse shading losses, which may significantly reduce the diffuse component in 3D urban environments. Hence, we attempt to derive an explicit solution for the sky viewshed computation using 3D models.…”
Section: Related Workmentioning
confidence: 99%
“…Surface inclination and orientation are key factors in determining irradiance [21] and are the basic parameters of the r.sun model. Both the inclination and the orientation at P can be derived from the associated surface normal vector [15].…”
Section: The Rsun Solar Radiation Model and Its Extensionmentioning
confidence: 99%
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“…Solar irradiance can be decomposed into three components [31,32]: direct irradiance, diffuse irradiance and reflected irradiance. These three components are important and significantly influence the total irradiance [33], so they have been analyzed separately in this approach.…”
Section: Estimation Of the Solar Irradiationmentioning
confidence: 99%