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GIS coaching for territorial management.

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Author: Atilio Francois

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Image classification tutorial with ArcMap: 1- Introduction

Firstly, a warning: this tutorial is not intended for those users whose job is spatial image processing . It is intended for GIS users who need to engage in image processing in order to improve their…

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Display a shape file in Google Earth

Even if Google does not advertise, you should be aware that the Google Earth Pro license has become free since the beginning of 2015. Therefore, you can download, install and use Google Earth Pro without limitations,…

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How to edit a svg symbol (colour, stroke) in QGis

If you import or create svg symbols to use in QGis you will noticed that the colour change options and outline of these symbols are disabled in QGis. In fact, these settings are hard-coded in the…

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How to find the coordinate system of a layer in ArcGis 10.X?

Usually, all layers of geographic data have the description of the coordinate system. Unfortunately, this is not always the case. In general, the problem greatly increases with the fact that, usually, it is quite (or completely)impossible…

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Geometry validation tools (5) with QGis

In previous articles, we have discussed the geometry validation tools with ArcGis,Spatialite / Postgis, FME and Geomedia. We still have to discuss this feature with QGis. You will see, it is not easy to find it!…

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Geometry validation with QGis 2.12.0

We have already discussed the geometry validation in a series of articles. Particularly, you can read the article The  geometry validation  tools (5) with QGis for the validation tools with QGis 2.8 Version 2.12 brings a…

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Recent articles

  • Converting a class raster to a fuzzy raster in QGIS
  • Converting a raster into fuzzy values with FuzzyAttributes V2
  • Consultation and negotiation: the contribution of fuzzy logic
  • PostGIS 3.6 released – 3D, raster, and topology take a leap forward
  • Creating awareness maps with QGIS: the equivalent of the Above and Below style

Recent comments

  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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