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GIS coaching for territorial management.

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Author: Atilio Francois

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Image classification tutorial with QGis: 2- Data pre-treatment and exploring

Pre-processing functions are operations that are typically required before performing the main analysis and retrieval of the information. Pre-processing operations are divided into radiometric corrections and geometric corrections. Radiometric corrections include, but are not limited to,…

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Image classification tutorial with ArcMap: 2- Data pre-treatment and exploring

Pre-processing functions are operations that are typically required before performing the main analysis and retrieval of the information. Pre-processing operations are divided into radiometric corrections and geometric corrections. Radiometric corrections include, but are not limited to,…

Read More
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Image classification tutorial with QGis: 1- Introduction

Firstly, a warning: this tutorial is not intended for 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 data. The…

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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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Recent articles

  • Exporting a QGIS layout to SVG: uses, limitations, and solutions
  • Associating points with their municipality or zone: simple spatial joins with MMQGIS
  • Geocoding place names and finding an address from GPS coordinates with QGIS + MMQGIS
  • Work or train independently: create a portable QGIS environment
  • Building a consistent, reusable QGIS environment: bookmarks, project templates and automation

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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