I precise that I want to do it on a command line web server so I have no GUI, I think about a script Sylvain Ard 0549507724 0778380991 sylvain....@gmail.com http://sylvain-ard.fr Entreprise individuelle SIRET : 80079243400022 Appt 26 Bât A Résidence Le Patio 83 rue de la Bugellerie 86000 Poitiers
Le ven. 8 mars 2024 à 18:58, chris hermansen <clherman...@gmail.com> a écrit : > Sorry everyone, pressed "send" too early! > > On Fri, Mar 8, 2024 at 9:55 AM chris hermansen <clherman...@gmail.com> > wrote: > >> 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 >> >> Also worth learning about is how QGIS handles point clouds and whether > that might apply to solving your problem > > > https://docs.qgis.org/3.34/en/docs/user_manual/working_with_point_clouds/point_clouds.html > > -- > Chris Hermansen · clhermansen "at" gmail "dot" com > > C'est ma façon de parler. >
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