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 use. However, it relies heavily on available live memory and will break with voluminous datasets. Which is what elevation models usually are... Version 0.6.4 introduces an addition to the original algorithm … Continue reading Visibility analysis for QGIS 3.0 : tackling big data

Land visibility in the Mediterranean: a large scale model

Visibility of land was a major consideration for ancient seafaring, for reasons of navigation and security. Even if the open sea travel must have been practised already by the Neolithic period, judging by the colonisation of remote islands and by the exchange of artefacts across the Mediterranean, the sight of the land remained a much … Continue reading Land visibility in the Mediterranean: a large scale model