This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision | Next revision Both sides next revision | ||
|
teaching:projh402 [2020/10/12 19:10] ezimanyi [Map-matching as a Service] |
teaching:projh402 [2020/10/12 19:11] ezimanyi [Map-matching as a Service] |
||
|---|---|---|---|
| Line 51: | Line 51: | ||
| 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&200|}} | + | {{:teaching:original.png?direct&400|}} {{:teaching:mapmatched.png?400|}} |
| - | + | ||
| - | {{:teaching:mapmatched.png?200|}} | + | |