Map Matching pure Java without WebInterface

karussell · July 27, 2016, 11:07am

Currently investigating this and will be part of the test suite once this is fixed so that it does not occur again.

karussell · July 27, 2016, 11:41am

I’ve investigated this and it turns out this was mainly a wrong gpx_accuracy problem. If you increase this value now you’ll get a perfect match:

If you keep it low the algorithm does only find close edges and will route you there.

Keep in mind that there were several problems which made the specified gpx_accuracy != the used one, all of them are now fixed in master and you can import the area and do the matching via the new frontend.

womisa · July 27, 2016, 1:25pm

Hi Peter,

thanks for your response. Now my very bad Gpx LogFile works very well with “mapMatching.setMeasurementErrorSigma(100);”

I have a pure local system with “OAM” Maps and it is very hard for me to build this from soruce (Intellij) without maven. I do not know how to import the project without restructure in Intellij and build without Maven.

I hope and wish you make a Snapshot jar file …“map-matching-web-xxxxxx-jar-with-dependencies.jar”

Thank you very much
Achim

karussell · July 27, 2016, 2:04pm

Nice to hear this!

Regarding the snapshot: you can build this locally - it is just mvn clean install -DskipTests=true and then you should be able to refer to the installed jars via version 0.8-SNAPSHOT, also have a look at this issue - ie. it is in the works

womisa · July 27, 2016, 2:36pm

sure…

but my testsystem is a pure local system (no virus) without I_Net connection. Thanks for the hint.

so i have this (Download Errors)…

INFO] Scanning for projects…
Downloading: Index of /maven2/org/sonatype/oss/oss-parent/9/
oss-parent-9.pom
[ERROR] The build could not read 1 project → [Help 1]
[ERROR]
[ERROR] The project com.graphhopper:graphhopper-map-matching-parent:0.8-SNAPSH
OT (E:_ProjectsLokal_My_Graphhopper\Snapshots\27.07.2016_map-matching-master\m
ap-matching-master\pom.xml) has 1 error
[ERROR] Non-resolvable parent POM: Could not transfer artifact org.sonatype.

karussell · July 27, 2016, 2:43pm

Then call

mvn --projects hmm-lib -DskipTests=true install
mvn --projects matching-web,matching-core -DskipTests=true install assembly:single

on some machine with internet and copy the file(s) to your offline machine

womisa · July 27, 2016, 3:06pm

Hi,

i have inserted a OAM map in your WebApp with the MOBAC (local)Tileserver.

How start your MapMatchServer local?

sure…thanks

karussell · July 27, 2016, 4:38pm

See GitHub - graphhopper/map-matching: The map matching functionality is now located in the main repository https://github.com/graphhopper/graphhopper#map-matching

womisa · August 29, 2016, 3:25pm

Hi Peter,

i have a Bike2WeightFlagEncoder track match (setMeasurementErrorSigma(50)) with minor abnormalities FYI (see Snapshots).
green Bike Track (Douglas Peuker)
red match Track with minor abnormalities

Best regards
Achim

2016-08-27 1250__20160827_1250_Rutesheim_rtw_4.gpx.txt (39.1 KB)
2016-08-27 1250__20160827_1250_Rutesheim_rtw_4.gpx.match.gpx.txt (175.0 KB)

karussell · August 29, 2016, 3:48pm

Yes, I observed similar for bike2 as it does not prefer the ‘fastest’ and sometimes introduces some obstacles. Probably try racingbike which could be better. Furthermore those ‘single-branch’ problems (e.g. first screenshot) should be improved on our side, or try setting higher measurement error.

The last problems seems to be oneway problems, please try matching via a different direction, also see this issue: https://github.com/graphhopper/map-matching/issues/63