[OSM-talk] A GPS Trace Visualizer

[davespod]

> There is likely to be a considerable difference between the average speed
> and the maximum speed, particularly along streets that are badly congested
> at different times of day.  The average speed is useful for routing
> decisions,
> but should be tagged separately from the maximum speed.

Even average speed for routing purposes would be difficult to determine. How
would you differentiate between car, motorcycle, bicycle, unicycle, horse or
shank's pony*?

David

* Apologies: just remembered the international audience: this is an idiom
meaning walking.

-------Original Email-------
Subject :Re: [OSM-talk] A GPS Trace Visualizer
>From  :mailto:deltafoxtrot256 at gmail.com
Date  :Wed Aug 18 07:57:17 America/Chicago 2010


On 18 August 2010 22:51, andrzej zaborowski <balrogg at gmail.com> wrote:
> For some time I have been thinking about making a tileserver / WMS
> with a visualisation of OSM GPS traces, but one where you can see how
> many traces overlap at a given point (so some kind of heat map thing).
>  This would be used for tracing in JOSM instead of displaying all the
> traces in the same colour.  This would really let you estimate where
> the centreline of a road / lane is and would let you really take
> advantage of having 1000s of traces for the same street (like in big
> cities with many mappers).

The centre line is obvious, but there is a number of other things you
could do as well, like indicating average/mean speed to help with
maxspeed=* tagging and also where traffic lights exist.

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