OpenStreetMap
Routing must be broken....
Апублікавана карыстальнікам evolvedlight 22 Кастрычнік 2009 на мове EnglishJust went through areas near me and corrected about 50 errors from keep right. How do any routing algorithms actually work when the data is so bad?
Абмеркаванне
Каментар ад wallclimber21 у 22 Кастрычнік 2009 у 01:16
They don't. :-)
Which is why it's so important to fix keepright errors!
Каментар ад Gregory Williams у 22 Кастрычнік 2009 у 08:40
Remember that the data quality varies from area to area. It may be, for instance, that a mapper in a given area isn't aware of the important that connecting roads / footways etc. need to be connected via a common node, whereas mappers in other areas can be fully aware of this.
When you're discovering these errors are you sending a quick message to the person that mapped it to help educate them on how to input routable data? Otherwise that person may just continue to enter unroutable data, thus creating more work for you to fix.
Каментар ад DanHomerick у 23 Кастрычнік 2009 у 00:03
In the US, long distance routing has improved a lot due to the 250 cities project:
osm.wiki/TIGER_fixup/250_cities
The project helped identify the problem areas (everywhere, at first!) and gave a quantitative track of the progress being made. For me, at least, it was a great motivator.