[OSRM-talk] SafestWay: OSRM + OSM = Making walking safer, one step at a time.

[Emil Tin]

I don't think so, since the contraction hierarchies are constructed (during preprocessing) according to the impedance (weight). Different weights would mean a completely different hierarchy.


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Emil Tin
IT- og Processpecialist
Trafikdesign
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Fra: Emil Tin
Sendt: 15. april 2013 09:09
Til: 'osrm-talk at openstreetmap.org'
Emne: SV: [OSRM-talk] SafestWay: OSRM + OSM = Making walking safer, one step at a time.


With the current implemtantion, you cannot change paramters for routing after you preprocessed the data.

Butyou might be able to just run 1 osrm process, and then preprocess for the next hour, swap osrm process, and process next hour, and so on, as long as your processesing doesn’t take more than one hour .



Med venlig hilsen

Emil Tin
IT- og Processpecialist
Trafikdesign
________________________________
KØBENHAVNS KOMMUNE
Teknik- og Miljøforvaltningen
Center for Trafik

Islands Brygge 37 Vær. 118
Postboks 450
2300 København S
Mobil

+45 2369 5986

Email

zf0f at tmf.kk.dk<mailto:%20zf0f at tmf.kk.dk>

EAN

5798009493149




Fra: Jeffrey Mealo [mailto:jmealo at stringtheoryschools.com]
Sendt: 12. april 2013 19:03
Til: osrm-talk at openstreetmap.org
Emne: Re: [OSRM-talk] SafestWay: OSRM + OSM = Making walking safer, one step at a time.

Emil,

Thanks for the reply.

I'm trying to figure out a way to store between 12 to 24 crime "speeds" which will take into account when the crime occurred. That way you can find a route to and from school based on when you will be walking.

I saw in several parts of the routing that speed is multiplied by distance. I was wondering if it'd be possible to take additional route parameters in (the current time) and try to store crime weights.

I'm not sure if it's possible to fit that amount of information into the current field used for speed, or if I could  make modifications to the data files.

If this sounds difficult. I could also make a utility to change just the speeds in the road network and run 12-24 routed processes (not a long term solution; given I want this to be easy to deploy and have modest hardware requirements).

I realize that the algorithm calculates the shortest routes ahead of time. This doesn't limit the ability to add in weighting and other factors during routing, does it?

Regards,

Jeffrey Mealo
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