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Author: Atilio Francois

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How to create Tanaka’s illuminated contours with QGis

The Tanaka’s contours are a method of displaying terrain developed by Professor Tanaka Kitiro in 1950. Tanaka called his technique the “Relief Contours Method”. However, it is usually called the “Illuminated Contour Method” or the “Tanaka…

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Model Builder: how to convert a batch model to an interactive model

The principle of Model Builder is to create geoprocessing tools, which are by definition “batch” tools. This means that there is no   interaction between the user and the processing, once launched. You define the input…

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How to calculate local averages in the Voronoï polygons with Qgis

The Voronoi maps are built based on a series of polygons created around the location of each sampling point. The Voronoï polygons are created in such a way that each location in a polygon is closer…

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Share your resources (symbols, images, scripts) for Qgis with the new Resource Sharing plugin

The QGis resource sharing plugin is now available. This plugin makes it possible to share all type of resources for QGis: libraries of symbols , styles, images and scripts. These items can be stored   remotely…

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QGis 2.8 Wien: calculation of Hypsometric Curves

The new version of QGis is available. Among the novelties announced in this version, the calculation of the curves hypsometric is included. Here is an article to discuss how this new algorithm works.

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Exploratory Data Analysis for Geostatistics: the Histograms

Following the article Introduction to Exploratory Data Analysis for Geostatistics , we will begin to address each of the tools available for performing the exploratory analysis of spatialized data. We will start with the histograms. Histograms…

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  1. Atilio Francois on How to develop an application with pgrouting in Windows (1)25 August 2025

    You're right — since 2019 Geofabrik no longer provides plain `.osm` files, only the compressed `.osm.pbf` format. The tool **osm2pgrouting**…

  2. Simon on How to develop an application with pgrouting in Windows (1)25 August 2025

    The osm downloads don't appear to be available, just osm.pfb And osm2pgrouting on Windows doesn't like pbf "not well formed…

  3. Arno on Portable version of QGis 3.32.021 August 2025

    I just want to thank you. It works.

  4. Atilio Francois on Portable version of QGis 3.32.015 May 2025

    What is the link between the qgis update and the portable version? A portable version cannot be updated; it must…

  5. Hugo on Portable version of QGis 3.32.014 May 2025

    For me, the error message complaining that qgis_app.dll is missing started appearing following the most recent QGIS update.

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