Archive
Tag: QGIS visibility plugin
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Visibility index (total viewshed) for QGIS : finally there!
Welcome visibility index algorithm, a.k.a. total viewshed, now available in QGIS Visibility analysis plugin. This metric informs us on the size of the visual…
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Distance and direction filters for QGIS Viewshed analysis
Viewshed analysis produces a model of visible areas from a chosen point, given a 2.5 or 3D elevation model. Most often, we model full…
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Viewshed analysis in QGIS 3: a tutorial
Viewshed analysis denotes field of vision modelling in GIS jargon. The term is quite awkwardly borrowing its suffix from watershed, even if there is…
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Analysing visual impact of high buildings: the Urkulu tower
Introduction A common problem in visibility analysis is to determine the visual impact of a tall building, for instance a skyscraper or a wind…
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Intervisibility analysis in QGIS: an archaeological tutorial
Intervisibility analysis tests the potential for visual connection between two observers. I say potential because visibility on landscape scale is often the question of…
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Depth below horizon: new (old) functionality for QGIS viewshed analysis
The basic idea of visibility analysis is to test whether particular locations are theoretically observable from a given observer point (« theoretically » because…
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Visibility analysis for QGIS 3.0 : tackling big data
Viewshed plugin for QGIS is based on Numpy library for handling raster data. Numpy is tuned for high performance and is (relatively) easy to…
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Benchmarking viewshed algorithm: Nuraghi of Sardinia
The new viewshed plugin for QGIS 3 features an improved algorithm which should result in perceptible improvements in terms of efficiency. So let’s give…
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Visibility analysis for QGIS 3.0
Visibility analysis plugin is now available in QGIS 3.0! It has been completely refurbished: from now on it will be integrated into the “Processing…
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Visibility analysis, release 0.5.4: modelling the horizon
Visibility analysis plugin for QGIS is prospering quite well. As of writing [2016], it counts some 20 000 downloads and a bunch of «…