The display traffic was an example and I was thinking it was just a GUI thing. What I am actually modelling is cable laid in the ground. And what I want to show is a heatmap representing the likelihood of there being an issue at this point on the fiber. The data will be stored as an array of numbers which each cell corresponds to a distance along a route. This array could be thousands of values.The heatmap will be in the shape of the lines. So I did not want to have as many line segments as I do cells in the array just to represent one cable.
On Thu, Feb 27, 2020 at 12:53 AM Mohit Sindhwani <m...@onghu.com> wrote: > On 2020-2-26 8:48 am, Erik H wrote: > > Depends on your requirements. If you just want to visualize typical > > traffic conditions, MapServer can do the job, it's pretty > > straightforward. Just join your road geometries with the congestion > > data (actual speed / free-flow speed), apply some filters (SQL > > conditions) on road class and maybe congestion (omitting non-congested > > roads), and render that in the appropriate color. > > > > If, on the other hand, you have a feed with speeds that vary > > frequently, it gets tricky because you can't really use a regular tile > > cache. I ended up abandoning MapServer for this - the problem was not > > so much the rendering, but PostGIS was getting overwhelmed. If you get > > your speed data from a company like HERE or INRIX, you should be able > > to use their tilers. If not, you have a nice challenge. > > How is the data created and stored? How large is the area? We do a bunch > of things as a traffic services company, and have found that different > things work better for different scenarios. MapServer and GeoServer have > both worked for us in the past. The challenge is always on how pretty > you want it to be, how much compute you're willing to spend, how often > the data updates, etc. > > It's correct that the regular tile cache doesn't expire data in the best > way to support this :) > > Best Regards, > Mohit. > 2020-2-27 | 1:44 pm. > > > _______________________________________________ > mapserver-users mailing list > mapserver-users@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/mapserver-users -- http://www.atlantageek.com
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