Hi Jakob,
Thanks once again for your consideration and thoughtfulness.
Worked perfectly! Amazing: ). In the weekend, I will try it on our city(larger
scale).
For other people who may face this issue in the feature, I used this command:
duarouter --trip-files=trip.trips.xml --net-file=map.net.xml
--output-file=Test.rou.xml
--taz-files=TazGeneratedBygenerateBidiDistricts.taz.xml --with-taz
Just a quick question: Taz file that I need to use should have all the edges,
right? Because this approach does not work on the small taz file that I
generated manually, but it worked on the taz file which I generated by the
generateBidiDistricts script.
Thanks once again. This was a great help.
CheersMohsen
On Tuesday, May 2, 2017 10:56 PM, Jakob Erdmann
<[email protected]> wrote:
Hello,
the problem is due to a misunderstanding. OD2Trips treats taz differently: a
fixed source/arrival edge is selected randomly from all edges in the TAZ.
Instead, you should
- generate the trip file with your own process which arbitrarily uses either
downstream or upstream edge that fit the coordinates but instead of 'from' and
'to' write that edge to the attributes 'fromTaz' and 'toTaz'
- run generateBidiDistricts.py to generate TAZ of the following form
<tazs><taz id="-16686683#3" edges="-16686683#3 16686683#3" /> <taz
id="16686683#3" edges="-16686683#3 16686683#3" />
</tazs>
- load those trips into sumo and enjoy better routes.
Explanation: these TAZ encode the fact that for both upstream and downstream
edges both departure (and arrival) directions are ok.
regards,
Jakob
2017-05-02 12:19 GMT+02:00 mohsen hs <[email protected]>:
Hi Jacob,
Thanks a lot for your reply and consideration. I tried that, but I did not get
what I expected. I am suspicious that I have done something wrong and would be
grateful if you could advise. Please note we are left-hand side.
I put the code, input, and output below.
Looking forward to hearing from you.
Many thanksMohsen
First: I created a taz file as follows: <tazs><taz id="1" edges="-16686683#3
16686683#3" /> <taz id="2" edges="-256521845#1 256521845#1" /></tazs>
Second: My ofm file$O;D28.01 8.0211 2 52 1 1
Third: commandod2trips -n taz.taz.xml -d input_od_o.fma -o tripmatrix.trips.xml
--scale 1
Forth: output (tripmatrix.trips.xml)<routes xmlns:xsi="http://www.w3.org/
2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation=
"http://sumo.dlr.de/xsd/ routes_file.xsd"> <trip id="1" depart="28869.51"
from="16686683#3" to="-256521845#1" fromTaz="1" toTaz="2" departLane="free"
departSpeed="max"/> <trip id="2" depart="28870.32" from="16686683#3"
to="-256521845#1" fromTaz="1" toTaz="2" departLane="free" departSpeed="max"/>
<trip id="4" depart="28878.88" from="-16686683#3" to="256521845#1" fromTaz="1"
toTaz="2" departLane="free" departSpeed="max"/> <trip id="0"
depart="28895.35" from="-16686683#3" to="256521845#1" fromTaz="1" toTaz="2"
departLane="free" departSpeed="max"/> <trip id="3" depart="28898.16"
from="-16686683#3" to="256521845#1" fromTaz="1" toTaz="2" departLane="free"
departSpeed="max"/> <trip id="5" depart="28915.65" from="-256521845#1"
to="16686683#3" fromTaz="2" toTaz="1" departLane="free"
departSpeed="max"/></routes>
As shown above, for the first 5 trips (from zone 1 to zone 2), the 'from'
should be the negative edge (-16686683#3) and arrival should be the positive
edge (256521845#1). Unfortunately, the first two do not follow this rule.
One more question please: how does od2trips can detect which edge is upstream
and downstream without having the net.xml file as a parameter?
On Tuesday, May 2, 2017 4:47 AM, Jakob Erdmann <[email protected]>
wrote:
The solution lies in letting the router decide from which of the two
directional edges to start / arrive.
This can be done using traffic assignment zones which puts both edges (positive
and negative number) into one zone. These zones can be generated automatically.
See
http://sumo.dlr.de/wiki/ Definition_of_Vehicles,_ Vehicle_Types,_and_Routes#
Traffic_assignement_zones_. 28TAZ.29
http://sumo.dlr.de/wiki/Tools/ District# generateBidiDistricts.py
regards,
Jakob
2017-04-30 8:03 GMT+02:00 mohsen hs <[email protected]>:
Hello all,
I have some data from actual traffic devices and would like to generate the
traffic based on the collected traffic data. My collected data is like this:
Source Street(SS), latitude of SS, longitude of SS, number of observed
vehicles, Destination (DS), DS latitude, DS longitude, arrival time at DS
I have generated net.xml for my city and I wrote an application to extract
edges and store them in my database (db). I also wrote an application that can
generate trips.xml for me based on the data in my db. I also stored lat, long,
and street names from map.osm in my db. So I can easily correlate lat and long
(from map.osm) with edges (from net.xml). The problem that I am facing is
related to generating the trips based on the edges (to and from). I can find
the closest edge to my SS/SD by finding the minimum Euclidean distance between
SS/DSs' lat/long and edges' lat/long. But, I have difficulty in selecting the
negative edge or positive edge as from/to. For example, after calculating the
minimum Euclidean distance, the start point matches the following edges (see
below screenshot) and the direction of travel (SS->SD) in my case is North. So,
I have to select the negative one, but I can not do this manually. I was
wondering if you could help me to find a way to automate this process.
Please let me know if you need more information.
Looking forward to hearing from you.
Regards,Mohsen
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