[Qgis-user] question abot shapes

[chris hermansen]

Sylvain and list,

On Fri, Mar 8, 2024 at 8:15 AM Sylvain Ard via QGIS-User <
qgis-user at 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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