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Tag: qgis

  • 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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  • english posts
  • PostgreSQL

Spatial analysis with SQL: 5- aggregation function (ArcGis Union)

In Article previous we have discussed some SQL functions for spatial processing . In this article we will see a function a little more complicated to put at work: the aggregation function for two layers of…

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  • english posts

1-n joins in QGis: virtual layers

One of the most common techniques in GIS in order to treat non-spatial data is that of the join. We use a geographical layer having geometries, as support for another layer having no location data. To…

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  • QGis

QField: the mobile device of QGis for Android

QField allows you to do fieldwork on QGis projects with Android phones or tablets. In this article we will discuss how to install QField on a mobile device and how to install and work on a…

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  • Database
  • QGis
  • Spatialite

How to create a SpatiaLite database with QGis

If you start to feel tired of managing your data as shape files (this format dates back to the eighties!) and you yearn for a genuine database for your projects, most certainly, you will be looking…

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Recent comments

  1. 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…

  2. 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.

  3. Atilio Francois on Portable version of QGis 3.32.07 May 2025

    Hello The problem with the portable version is that it's very dependent on the particular configuration of the machine. The…

  4. NotFred on Portable version of QGis 3.32.07 May 2025

    I have never had QGIS installed in my machine (it's a brand new laptop) and I get the same error,…

  5. Atilio Francois on Portable version of QGis 3.32.028 April 2025

    The file is present in the download ...\QGIS 3.32.0\QGIS 3.32.0\apps\qgis\bin The error message probably comes from a previous installation of…

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