# Overview
This project demonstrates how to use the [hmm-lib](https://github.com/bmwcarit/hmm-lib) for
matching a sequence of GPS coordinates to roads (called offline map matching) but does not provide
integration to any particular map.
This map matching approach is based on Hidden Markov Models (HMM) and described in the following
paper:
*Newson, Paul, and John Krumm. "Hidden Markov map matching through noise and sparseness."
Proceedings of the 17th ACM SIGSPATIAL International Conference on Advances in Geographic
Information Systems. ACM, 2009.*
# Integation with other libraries
To make map matching work with an actual map the following needs to be further implemented:
* compute map matching candidates (i.e. possible road positions) for each GPS position
* compute distances between GPS positions and map matching candidates
* compute shortest routes between subsequent map matching candidates
These computations are not provided by this project because they are usually dependent on the
underlying map. Moreover, this lets the user choose his own favorite geospatial/routing libraries.
# License
This library is licensed under the
[Apache 2.0 license](http://www.apache.org/licenses/LICENSE-2.0.html).
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离线地图匹配,利用HMM隐马尔科夫模型实现离线地图匹配
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offline-map-matching-master.zip (15个子文件)
offline-map-matching-master
NOTICE 822B
pom.xml 3KB
LICENSE 10KB
src
test
java
com
bmw
mapmatchingutils
OfflineMapMatcherTest.png 81KB
DistributionsTest.java 1KB
OfflineMapMatcherTest.java 8KB
types
RoadPosition.java 2KB
GpsMeasurement.java 1KB
Point.java 1000B
RoadPath.java 2KB
main
java
com
bmw
mapmatchingutils
TimeStep.java 3KB
Distributions.java 2KB
HmmProbabilities.java 4KB
.gitignore 72B
README.md 1KB
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