Interpreting HERE Maps real-time traffic tags

Question

I've read all the HERE Maps API documentation but couldn't find the answer. What is the meaning of the XML tags in the HERE real-time traffic REST API output?

<FI><TMC PC="4375" DE="Rivonia Road" QD="-" LE="0.55047"/><CF CN="0.83" FF="24.0" JF="6.8228" SP="10.78" SU="10.78" TY="TR"/></FI>

Does anyone know how to interpret this output (I used proximity parameter in my request)?

Antitoxin

Please see my answer here. – Rummy

OK - thank you for the hint – Antitoxin

Answer 1

I noticed that a lot of people have this question and the answer is somewhat difficult to find. I've posted a list of the tag meanings I could find below.

• "RWS" - A list of Roadway (RW) items
• "RW" = This is the composite item for flow across an entire roadway. A roadway item will be present for each roadway with traffic flow information available
• "FIS" = A list of Flow Item (FI) elements
• "FI" = A single flow item
• "TMC" = An ordered collection of TMC locations
• "PC" = Point TMC Location Code
• "DE" = Text description of the road
• "QD" = Queuing direction. '+' or '-'. Note this is the opposite of the travel direction in the fully qualified ID, For example for location 107+03021 the QD would be '-'
• "LE" = Length of the stretch of road. The units are defined in the file header
• "CF" = Current Flow. This element contains details about speed and Jam Factor information for the given flow item.
• "CN" = Confidence, an indication of how the speed was determined. -1.0 road closed. 1.0=100% 0.7-100% Historical Usually a value between .7 and 1.0
• "FF" = The free flow speed on this stretch of road.
• "JF" = The number between 0.0 and 10.0 indicating the expected quality of travel. When there is a road closure, the Jam Factor will be 10. As the number approaches 10.0 the quality of travel is getting worse. -1.0 indicates that a Jam Factor could not be calculated
• "SP" = Speed (based on UNITS) capped by speed limit
• "SU" = Speed (based on UNITS) not capped by speed limit
• "TY" = Type information for the given Location Referencing container. This may be freely defined string

Source: http://traffic.cit.api.here.com/traffic/6.0/xsd/flow.xsd?app_id=YOUR_APP_ID&app_code=YOUR_APP_CODE

Antitoxin

There is a more complete description in a PDF document provided by them: documentation.developer.here.com/pdf/traffic_hlp/6.0.68.0/… – Leavetaking

BTW, how do I determine the Fully Qualified ID descripted in the QD field? – Leavetaking