[Qgis-user] Developing a directed graph

[chris hermansen]

Advani Chintan and list,

On Wed, Jun 17, 2020 at 2:12 PM Chintan Advani <chintanadvani at gmail.com>
wrote:

> Hello everyone,
>
> I am looking to create a directed graph based on a set of sensors on a
> road network. I have the coordinates of the sensors and the shape file of
> the network/ road layer. Is it possible to develop a directed graph /
> adjacency matrix using GIS tools. I have little to no experience in python
> scripting and hence looking for some inbuilt tools in GIS.
>

I guess you want to end up with something like a spreadsheet / database
table where each row represents the directional path from node A to node B,
with some additional attributes like distance and which sensor is tied to
it?

So that your main GIS-related concerns are:

   - connecting the sensor to the appropriate road segment;
   - developing the "statement of direction" (for example, the source node
   at one end of the road segment and the destination node at the other).

Does this make sense?

Right now how is direction modelled in your data?

-- 
Chris Hermansen · clhermansen "at" gmail "dot" com

C'est ma façon de parler.
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