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Python Methods for QGis: How to access vector data (postgis, spatiality)

In this series of articles we discuss how to access vector type data in Python and QGis. In the previous article ( Python Recipes for QGis: access data vector (shapefile) ) we have discussed  how to…

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Python Methods for QGis: access to vector data (shapefile)

  In this series of articles we are going to discuss how to access the vector type of data with Python and QGis. Firstly we will discuss how to load various vector data formats (shapefile, postgis…

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Displaying marine charts with S57 QGis

The sources of information for the coastal regions are not limited to classical terrestrial sources. The marine charts can provide information very helpful and they allow creating rich and impactful documents. The most adapted sources to…

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ArcGis Model Builder: FOR and WHILE iterators

In the previous article ( ArcGIS Model Builder: expand a model to a set of input data ) we have addressed the most common iterators used with Model Builder. These iterators make it possible to apply…

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QGis 2.14 and Grass 7: how to do it?

Since QGis version 2.14, whichever the Installation chosen, it has become impossible to use Grass 7 from the window of treatments. An error message such as, or similar to the following appears at when trying to…

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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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Recent articles

  • Fuzzy logic and GIS (2/2): from transformation to aggregation of spatial data
  • Fuzzy logic and GIS (1/2): an alternative to all-or-nothing for geographic analysis
  • 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

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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