Print Email Facebook Twitter A computationally cheap trick to determine shadow in a voxel model Title A computationally cheap trick to determine shadow in a voxel model Author Gorte, B. G.H. (University of New South Wales) Zhou, K. (TU Delft Optical and Laser Remote Sensing) Van Der Sande, C. J. (NEO BV.) Valk, C. (NEO BV.) Date 2018-09-19 Abstract Representation of scenes on the Earth surface by using voxels is gaining attention because of its suitability for integrating heterogeneous data sources in simulations and quantitative models. Computation of shadows in such models is needed, for example, to obtain crop suitability of agricultural fields in the presence of trees and buildings, or to analyze urban heat island causes and effects. We present an efficient algorithm to compute which of the voxels in a dataset receive direct sunlight, given the solar azimuth and elevation angles. The algorithm can work with multiple (sparse and dense) voxel storage strategies. Subject 3D City modelsQuantitative ModellingShadowSimulationVoxels To reference this document use: http://resolver.tudelft.nl/uuid:5800f78a-6f6a-4824-9e0f-ce3b99f78116 DOI https://doi.org/10.5194/isprs-annals-IV-4-67-2018 ISSN 2194-9042 Source ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences, 4 (4), 67-71 Part of collection Institutional Repository Document type journal article Rights © 2018 B. G.H. Gorte, K. Zhou, C. J. Van Der Sande, C. Valk Files PDF isprs_annals_IV_4_67_2018.pdf 913.23 KB Close viewer /islandora/object/uuid%3A5800f78a-6f6a-4824-9e0f-ce3b99f78116/datastream/OBJ/view