GIS coaching for territorial management.
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…
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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…
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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,…
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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…
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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…
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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…
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