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Tag: qgis

16 May 202320 May 2023 Atilio Francois No Comments
  • QGis

The Green View Index plugin in QGis

The QGIS Green View Index plugin is a powerful tool for measuring the vegetation cover of a given area. It is easy to use and provides valuable information to urban planners, landscape architects and environmentalists. By…

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9 May 20235 May 2023 Atilio Francois No Comments
  • QGis

Perry-Castañeda Library-southern europe 1943 maps: How to georeference?

The Perry-Castañeda Library Map Collection, located at the University of Texas, is one of the largest digital map collections in the world. This collection contains maps of all continents and many countries, as well as topographic,…

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2 May 202324 June 2023 Atilio Francois No Comments
  • Felt
  • QGis

Integrating a WMTS raster tile service in QGis 3 and Felt

What is WMTS? A good example of a WMTS service is OpenStreetMap. It consists of an address to which client programs can request geotagged images. When you load OSM into QGis, the program connects to the…

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1 May 20232 May 2023 Atilio Francois No Comments
  • QGis

How to find the coordinate system of a layer with QGis 3.X?

When working with spatial data in GIS software, you regularly encounter the problem of files that lack a clearly defined coordinate system. When a file lacks its coordinate system (CSR), it can lead to misaligned layers,…

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  • Non classé

How to install Python add- ons for ArcGis and QGis

For those who are not familiar with the oddities related to the use of Python add- ons , the almost unavoidable pitfall   installation of the module. You will find yourself with a .tar.gz file and…

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  • english posts
  • GIS and management
  • QGis

Python Methods for QGis: how to examine vector data

Once a layer is loaded, usually we want to access the data included in the layer, whether the geometries or the attributes. Now, we will discuss how to code in Python the access to these two…

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Recent articles

  • Fuzzy aggregation of two raster layers with FuzzyAttributes V2
  • 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

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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