[Qgis-user] question abot shapes

[Sylvain Ard]

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.ard at gmail.com
http://sylvain-ard.fr
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Le ven. 8 mars 2024 à 18:58, chris hermansen <clhermansen at gmail.com> a
écrit :

> 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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