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Re: [sumo-user] Vehicle position output
Hello,
SUMO uses UTM by default and shifts the coordinates so that the lower left network corner is at 0,0.
However, your original network file was created without projection information (projParameter="!").
In this case SUMO only takes the coordinates it was already given and shifts them without doing any projecting.
From their magnitude one can try guess what the original projection for the vissim data was (possibly UTM).

Do you know from which city this network is?

regards,
Jakob


2018-04-20 9:22 GMT+02:00 Thuresson, Daniel <daniel.thuresson.2@xxxxxxxxxxxxx>:

Hi,

 

I was expecting absolute values in some coordinate system (as stated in the manual). Manual also states that values should be offset with “netOffset”.

What kind of coordinates does SUMO output? UTM?

I don’t know much about the creation of the original net-file since that was created before I got involved. I think it originates from some VISSIM export, but not sure.

 

/Daniel

 

From: sumo-user-bounces@xxxxxxxxxxx [mailto:sumo-user-bounces@eclipse.org] On Behalf Of Jakob Erdmann
Sent: den 20 april 2018 09:03
To: Sumo project User discussions <sumo-user@xxxxxxxxxxx>
Subject: Re: [sumo-user] Vehicle position output

 

Hello,
What kind of coordinates would you expect? The origBoundary values look a bit like UTM values where the wrong zone was used for projecting something from Finnland.

regards,

Jakob

 

2018-04-20 7:58 GMT+02:00 Thuresson, Daniel <daniel.thuresson.2@volvocars.com>:

Hi,

 

I have the EmissionOutput activated and wants to use the x and y position output. The manual says this:

 

pos_x

---

The absolut X coordinate of the vehicle. The value depends on the given geographic projection.

pos_y

---

The absolut Y coordinate of the vehicle. The value depends on the given geographic projection.

 

 

Fine, but the results file looks something like this:

 

<vehicle id="100.39" type="veh165" lane="1072.0_0" speed="13.89" pos="71.74" angle="274.98" x="4687.89" y="1231.88" dist2front="170.56"/>

 

What are the x and y values? A coordinate relative to something?

A read about this in the manual and found out that you should:

 

“For networks with no projection (projParameter='!'), only the offset must be applied.”

 

Ok, my offset is this:

 

<location netOffset="-1433123.30,-7374447.50" convBoundary="0.00,0.00,9340.19,10863.49" origBoundary="1433123.30,7374447.50,1442463.49,7385311.00" projParameter="!"/>

 

If I subtract the offsets the result still makes no sense to me…

 

Any help is appreciated!

 

Rgds /Daniel


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