Posted inQGIS plugins
DEM shading algorithm for QGIS
I’ve been seeing on the net more and more of beautiful maps made in 3D software, Blender mostly. The reason for venturing into 3D: shadows mostly. While we do have…
Posted inQGIS plugins
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 a myriad factors (distance, atmosphere, signal…
Posted inQGIS plugins
Enhancing terrain cartography with natural shadows
QGIS algorithm for natural shadow modelling. Introduction Modelling natural illumination is quite difficult in software for digital cartography. Yes, we do have hillshading algorithms, but despite the name they do…
Posted inQGIS plugins
Terrain Position Index for QGIS
Topographic position index (TPI) is a method of terrain classification where the altitude of each data point is evaluated against its neighbourhood. If a point is higher than its surroundings,…
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Bulk editing posts for Jekyll
This website is generated by Jekyll, a static site generator. Static sites do not require complex backend engines, such as databases and software which recreate site content for each visitor.…
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Historicity and chronological puritanism.
If anything, archaeologists are much annoyed by messed up chronologies. There are always some “intrusive finds”, “residual artefacts” or “stray objects” that need to be sorted out and removed from…
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Pebbles, faces and landscapes: the archaeology of simulacra
[This article has been updated and transfered to fragments.hypotheses.org] Chichibu museum (photo: www.thisiscolossal.com) Several weeks ago I stumbled upon an amusing article on a museum displaying pebbles and rocks resembling…
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Some thoughts on hillshade models for Lidar analysis
Hillshade modelling is a standard form of terrain representation in cartography. The idea is to simulate lighting of a terrain from a certain direction (or multiple directions). The method is…
Posted inQGIS plugins
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 our data and algorithms can never…
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Installing Python packages in QGIS 3 (for Windows)
Python is in the heart of QGIS (or in the guts if you prefer), which enables us to use tons of third party Python libraries. In Linux systems, QGIS will…
