> Craig said: > >What is the point in mapping roads where the gritter drives, if it is >not gritting there? How is that useful for anyone? >
In the UK any government data based on a map tends to be derived from the national mapping agency and as such creates licence issues. We therefore opt to use the gritting "route schedules". These are literally a list of instructions in the form: * Leave depot, turn Right * GRIT to end of road, turn left * TRAVEL to main street, turn left * GRIT to ... and so on... I'm in two minds about whether to map the route as a relation, but I have to follow the route on the map just to work out which roads are gritted and which are not, so I may add it at the same time. Also if I add them to OSM then I can demonstrate a benefit to the local council - they could use the OSM data in a navigation device in the gritting trucks (thus ensuring that the correct route is followed every time and that excess grit is not wasted). Regards, Rob p.s. For some context, whether a road is gritted or not is quite important in the UK as we are lazy and don't tend to bother with winter tyres/chains etc.. There is a fine balance between gritting more so that the roads are kept moving (economic and safety benefit) and gritting less to reduce direct costs and the corrosion/environmental cost of excess salt/grit.
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