[Qgis-user] question abot shapes

[chris hermansen]

Sorry everyone, pressed "send" too early!

On Fri, Mar 8, 2024 at 9:55 AM chris hermansen <clhermansen at gmail.com>
wrote:

> 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
>
> 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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