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 quality etc…). Visibility analysis in GIS is usually taking into account only the terrain (plus solid buildings) and tests whether... [Read More]
Enhancing terrain cartography with natural shadows
Or, how to produce beauty in QGIS without 3D software.
QGIS algorithm for natural shadow modelling. [Read More]
Topographic position index: a numpy based implementation
Topographic position index (TPI) is a method of terrain classification where the altitude of each data point is evaluated against its neighbours. If a point is higher than its surroundings, the index will be positive, as for example on ridges and hilltops, while the figure will be negative for sunken... [Read More]
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. It’s just static files. This translates into a) free hosting (it’s cheap to host static files), b) super-fast websites (no... [Read More]