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 thanks > Mohsen > > 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;D2 > 8.01 8.02 > 1 > 1 2 5 > 2 1 1 > > Third: command > od2trips -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 > > > ------------------------------ ------------------------------ > ------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > ______________________________ _________________ > sumo-user mailing list > [email protected]. net <[email protected]> > https://lists.sourceforge.net/ lists/listinfo/sumo-user > <https://lists.sourceforge.net/lists/listinfo/sumo-user> > > > > > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ sumo-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/sumo-user
