Blog(en)

  • Crossing spatial selection and graphic analysis in QGIS with Data Plotly
    In our previous article, we discovered how to use the Data Plotly plugin to create graphs directly in QGIS. Today, let’s go a step further and learn how to dynamically filter the data displayed in graphs,…
  • Visualize your GIS data in QGIS with the Data Plotly plugin
    QGIS is a powerful Geographic Information System (GIS) software, renowned for its modularity thanks to its numerous plugins. Among these, Data Plotly stands out for its ability to create interactive graphics directly from GIS layers. A…
  • Heatmaps and hotspot maps in QGIS
    Heatmaps and hotspot maps in QGIS: understanding the differences In spatial analysis, heatmaps and hotspot maps are two powerful techniques for revealing concentrations or areas of interest from geographic data. While their appearance may be similar…
  • Easily add base maps to QGIS: three practical methods compared
    Introduction Adding map backgrounds is a key step in visualizing spatial data with QGIS. Whether it’s to contextualize your layers, create a beautiful printable map, or simply to better interpret your data, quickly having a background…
  • QGIS: A New “SQL Query” Option in the Layer Context Menu
    Starting with QGIS version 3.42, a subtle but powerful feature has been added to the context menu of vector layers: the “SQL Query…” option. This improvement provides a direct and user-friendly interface for running SQL queries,…
  • QGis and geoparquet
    History of Parquet and GeoParquet 1. Apache Parquet – The original format History: Objective: GeoParquet – Geospatial extension of Parquet History : Year Event 2021 (April) First exchanges on GitHub and in open source communities to…
  • ENC maps in QGis with Postgis(1)
    This subject comprises two articles. The first deals with importing ENC S57 files into a Postgresql/postgis database. The second deals with setting up an automatic symbology equivalent to nautical charts. You can download all the scripts…
  • Postgis:table with multiple geometries
    List partitioning in PostgreSQL/PostGIS is a declarative partitioning method that divides a large table into several sub-tables, according to the discrete values of a column (e.g. by region, type, year, etc.). This is particularly useful in…
  • Leaflet: responsive
    At the end of the Leaflet introductory course, the final mini-project looked like the following map: With a map displaying geojson data, a mini-map and a title. This screenshot was taken on a PC and looks…
  • MBtiles & Leaflet
    Introduction: What is the MBTiles format? The MBTiles format is a file format for storing map tiles (raster or vector) in a SQLite database, a lightweight, stand-alone database engine. Initially designed by Mapbox, this format has…