I would like to create a simple simulation of a trip using OSRM.
My question is basically how to convert the route returned by OSRM into a
position (lat/long)/time graph, or put another way, how the position at a
specific time can be determined given the route:
I believe the simulation steps would be as follows (my questions are in
parenthesis below)
a. Load OSM map of a city into OSRM
b. Choose a random begin, end location that falls within the city lat/long (how
to find lat/long limits of the loaded map?)
c. Compute the distance (in time) between start, end using OSRM
d. Also compute a path between start, end using OSRM (are the node vertices
mentioned in route the same as in the OSM map?)
e. The difficult part:
-- start the simulation by displaying the map along with position marker
(Leaflet?)
-- As time progresses, determine the location along the OSRM route computed
above (how can this be done?)
and adjust the position marker.
An OSRM route looks like this:"route_instructions": [
[
"10", <-------------------- what is this id and how to convert
it to lat/long
"Schulstraße",
126,
0,
18,
"126m",
"SE",
116
],
[
"7", <---------------- how to find elapsed time to this point
from previous one
"Am Rahmtor",
57,
2,
11,
"57m",
"NE",
38
]
Given a start and end lat/long, a network distance (time) can be obtained as
follows:
"distance_table": [
[
0,
26084
],
[
26084,
0
]
This would be useful if the route way-points above could be converted into time
units.
Would appreciate any help with the above questions,
Thanks
Sriram
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