Irradiation mapping of complex urban environments: an image-based approach

Mardaljevic, John; Rylatt, Mark

doi:10.1016/s0378-7788(02)00077-4

Cited by 56 publications

(37 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 5 illustrates a visualisation of a shadow analysis. This use case is also essential in the estimation of the solar potential of buildings, which may negatively affect the photovoltaic yield of a solar panel [102,112,[222][223][224][225][226][227]. In this context, this use case is closely related to the previously mentioned one of estimating the insolation of buildings, and they are often used together.…”

Section: Estimation Of Shadows Cast By Urban Featuresmentioning

confidence: 99%

Applications of 3D City Models: State of the Art Review

Biljecki

Stoter

Ledoux

et al. 2015

IJGI

632

380

View full text Add to dashboard Cite

In the last decades, 3D city models appear to have been predominantly used for visualisation; however, today they are being increasingly employed in a number of domains and for a large range of tasks beyond visualisation. In this paper, we seek to understand and document the state of the art regarding the utilisation of 3D city models across multiple domains based on a comprehensive literature study including hundreds of research papers, technical reports and online resources. A challenge in a study such as ours is that the ways in which 3D city models are used cannot be readily listed due to fuzziness, terminological ambiguity, unclear added-value of 3D geoinformation in some instances, and absence of technical information. To address this challenge, we delineate a hierarchical terminology (spatial operations, use cases, applications), and develop a theoretical reasoning to segment and categorise the diverse uses of 3D city models. Following this framework, we provide a list of identified use cases of 3D city models (with a description of each), and their applications. Our study demonstrates that 3D city models are employed in at least 29 use cases that are a part of more than 100 applications. The classified inventory could be useful for scientists as well as stakeholders in the geospatial industry, such as companies and national mapping agencies, as it may serve as a reference document to better position their operations, design product portfolios, and to better understand the market.

show abstract

Section: Estimation Of Shadows Cast By Urban Featuresmentioning

confidence: 99%

Applications of 3D City Models: State of the Art Review

Biljecki

Stoter

Ledoux

et al. 2015

IJGI

632

380

View full text Add to dashboard Cite

show abstract

“…Several authors have tried to demonstrate the use of such packages as Radiance 22 (Mardaljevic & Rylatt, 2003;Compagnon, 2004;Kamfp et al, 2010) and Heliodon2TM 23 Merino et al, 2010) and situate the use of ray tracing techniques in urban solar energy simulation. This was possible because the data for those projects are 20 http://www.polis-solar.eu 21 http://www.cuny.edu/about/resources/sustainability/solar-america/map.html 22 http://radsite.lbl.gov/radiance/ 23 http://www.heliodon.net/heliodon/index.html fully 3D whereas the data here is 2.5D.…”

Section: Performance Comparisons With Existing Packagesmentioning

confidence: 99%

Incorporating shading losses in solar photovoltaic potential assessment at the municipal scale

2012

View full text Add to dashboard Cite

Recently several algorithms have been developed to calculate the solar photovoltaic (PV) potential on the basis of 2.5D raster data that can capture urban morphology. This study provides a new algorithm that (i) incorporates both terrain and near surface shadowing effects on the beam component; (ii) scales down the diffuse components of global irradiation; and (iii) utilizes free and open source GRASS and the module r.sun in modeling irradiation. This algorithm is semiautomatic and easy to upgrade or correct (no hand drawn areas), open source, detailed and provides rules of thumb for PV system design at the municipal level. The workflow is pilot tested on LiDAR data for 100 buildings in downtown Kingston, Ontario. Shading behavior was considered and suitable roof sections for solar PV installations selected using a multi-criteria objective. At sub-meter resolution and small time steps the effect of occlusion from near object was determined. Annual daily horizontal irradiation values were refined at 0.55m resolution and were shown to be lower than those obtained at 90 m by 30%. The robustness of r.sun as capable of working with different levels of surface complexity has been confirmed. Finally, the trade off of each computation option (spatial resolution, time step and shading effect) has been quantified at the meso scale, to assist planners in developing the appropriate computation protocols for their regions.

show abstract

“…a 'half' or 'quarter' shade. To help planners, the irradiation map images could be incorporated as a layer in a geographic information system (GIS) [22].…”

Section: Irradiation Mapping Of 'Virtual London'mentioning

confidence: 99%