Browsing by Subject "3D city"

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Access status: Open Access ,
An analysis and 3D visualization of shading of urban spatial objects with the use of the Phython programming language in the Blender application
(2015) Ilba, Mateusz
Shading analysis has been performed for several years. It is commonly performed on the basis of raster data with saved height attributes. An undoubted advantage of the application of raster is the speed and the easiness of the analysis but this solution has also many limitations. One of them is the impossibility of executing a correct analysis for a 3D city. The analysis performed only on raster data cannot answer the question, what happens to vertical elements of buildings and yet surfaces of these elements (walls) are far greater in big cities than horizontal and oblique ones, which we are able to save as raster images [11]. It is only recently that the tools are available, which make it possible to analyze the shading on 3D models. However, such tools have a lot disadvantages, they are expensive and have some limitations. On the example of the ArcGIS application, the following limitations can be enumerated: difficulties, while determining shadowed surfaces together with their classification, in the case of the Bentley Microstation V8i application, there is no influence on the output classification, the access to the generated data is carried out by displaying results. Additional software for these applications is created but it is payable and also does not give 100% control over the presentation of results. It is in this article that we will take a closer look at the feasibility of an analysis of shading of high urban buildings and its visualization using an algorithm for ray tracing that is available in the Blender application available under the GPL license. The author tested the work of the application on an example of an artificially built part of a 3D city and on a part of New York.