Aux quatre vents


Landscapes and archaeology, mostly...

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 a, dans le monde du SIG, bien de solutions pour le travail collaboratif sur un même jeu de données, mais le plus souvent elles sont couteuses ou ...

Lissage du modèle numérique de terrain BD ALTI à 25 mètres

Le problème n’est pas nouveau, mais on ne trouve toujours pas de solutions simples pour le « maquillage » du modèle numérique de terrain (MNT) très couramment utilisé en France, le BD ALTI de résolution de 25 mètres. Celui-ci est disponible en valeurs entières, ce que lui donne un aspect en march...

Meet Senscape, a toolbox for analysis of human landscape experience

Viewshed analysis plugin for QGIS has been evolving (slowly) and eventually acquired a new habitat: the Processing toolbox. It can now be used in custom models and scripts similar to other Processing providers (such as SAGA or GRASS). The transformation was not a simple one and the whole thing i...

Visibility analysis, release 0.5.4:
modelling the horizon

Visibility analysis plugin for QGIS is prospering quite well. As of writing, it counts some 20 000 downloads and a bunch of « votes », which means that at least several thousand people are using it. (Although, it does feel uncomfortable knowing that any potential error would risk a blame-storm ….)

Pebbles, faces and landscapes:
the archaeology of simulacra

Several weeks ago I stumbled upon an amusing article on a museum displaying pebbles and rocks resembling human faces, situated in Chichibu, Japan. The stones are called jinmenseki (珍石) and one should be able to recognise human faces in their naturally occurring dents and holes.

Polar (azimuth) diagram in QGIS

Orientation of geographic features can be an important piece of information, for instance when studying ancient field systems or analysing geological formations. The problem comes when we try to summarise such data graphically . Standard histograms are not ideal because they cut through the conti...

Natural places and archaeology

First time I heard of something like “natural places” was some ten years ago at a conference in Slovenia. Several, mostly young researchers were proud to demonstrate an existence of non-man-made features on their sites, features that apparently gained a symbolic value before or during human habit...

Labelling features from north to south in QGIS

Making some order in feature labels on a map is, quite often, a pain. When there is no room for full labels or when there is such a large number of features that a reader cannot find his/her way through a forest of information - it is always handy to replace textual labels with a sequence of numb...