Sylvain and list, On Fri, Mar 8, 2024 at 8:15 AM Sylvain Ard via QGIS-User < qgis-user@lists.osgeo.org> wrote:
> > Good morning, > I have a PostgreSQL database of several million points with > latitude/longitude and I would like to do the following with qgis-server or > PostGis: > according to a number of shapes (hexagons, circles or squares) per mesh, > calculate the number of points per shape and color the shape darker as > there are points underneath. If there are no points the shape should not > appear. If we zoom in, the meshes must be recalculated and reduced of > course. On the other hand I would like a leaflet basemap. > I don't have a "follow this recipe" answer for you, but I wonder if you have looked at "heat maps" as a general concept and thought about how that might apply to your needs. For example, there is this interesting discussion on StackExchange about density of bomb craters: https://gis.stackexchange.com/questions/385338/point-density-map-in-qgis -- Chris Hermansen · clhermansen "at" gmail "dot" com C'est ma façon de parler.
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