Archive
Tag: QGIS
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Lissage du modèle numérique de terrain BD ALTI
Le problème n’est pas nouveau, mais on ne trouve toujours pas de solutions simples pour le « maquillage » du modèle numérique de terrain…
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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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Tanaka method or how to make shaded contour lines
Contour lines have become a commonplace, unassuming companion of our cartographic outputs – GIS has made us forget their visual potential. Already in the…
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My first QGIS map: the aid from Cyrene
Cyrene, Lybia Sometime during the reign of Alexander of Macedon a famine broke out in Greece. We don’t have many documents reporting the gravity…
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Polar (circular) diagram
Orientation of geographic features can be an important piece of information, for instance when studying ancient field systems or analysing geological formations. The problem…
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SIG collaboratif, solution simple et gratuite
Travailler, ce n’est peut-être pas toujours la chose la plus passionnante, mais c’est quand même plus amusant (et plus efficace) en collaboration. Il y…
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Postgis database: free online hosting
Postgis is the database software for collaborative work in the GIS environment. Multiple users can connect to the database and edit the data without…
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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 «…
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QGIS visibility analysis algorithm
Made for QGIS visibility plugin, version: 0.5 It took me long time to develop an algorithm for the visibility analysis which would be comparable…