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teaching:projh402 [2020/10/13 09:03] mahmsakr [Map-matching as a Service] |
teaching:projh402 [2020/10/13 09:03] mahmsakr [Map-matching as a Service] |
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| GPS location tracks typically contain errors, as the GPS points will normally be some meters away from the true position. If we know that the movement happened on a street network, e.g., a bus or a car, then we can correct this back by putting the points on the street. Luckily there are Algorithms for this, called Map-Matching. There are also a handful of open source systems that do map matching. It remains however difficult to end users to use them, because they involve non-trivial installation and configuration effort. Preparing the base map, which will be used in the matching is also an issue to users. | GPS location tracks typically contain errors, as the GPS points will normally be some meters away from the true position. If we know that the movement happened on a street network, e.g., a bus or a car, then we can correct this back by putting the points on the street. Luckily there are Algorithms for this, called Map-Matching. There are also a handful of open source systems that do map matching. It remains however difficult to end users to use them, because they involve non-trivial installation and configuration effort. Preparing the base map, which will be used in the matching is also an issue to users. | ||
| - | {{:teaching:original.png?direct|}} | + | {{:teaching:original.png?direct&400|}} |
| Original trajectory | Original trajectory | ||
| - | {{:teaching:mapmatched.png? |}} | + | {{:teaching:mapmatched.png?400 |}} |
| Map-matched trajectory | Map-matched trajectory | ||