Op di 10 mrt. 2020 om 01:03 schreef Alexander <[email protected]>: > Hi, > > Am Freitag, 6. März 2020 13:05:12 UTC+1 schrieb Harry van der Wolf: >> >> >> Sorry. My stupid mistake. I said roads, but I meant routing (of course). >> When I said that the data is not so big, I meant the routing data. >> >> > I don't see like that. Routing data may include at least every way which > is marked with keyword "highway". These are not only streets for cars, but > includes footpaths and all other variations of "highways". In the early > times of OSM there was only a street for cars. Pedestrian ways were mostly > "assumed" to exist as well. Then they were eventually excluded, then > seperate pedestrian paths were implemented, also separate cycle ways may > have been created. And see what happened to routing in forests, routing of > trekking paths and so on. While calculating the route even for cars, > everything on its way has to be considered to see if it fits or not. I find > this a quite enormous amount of data, growing massively. > > Best regards, Alexander. > > > I meant comparing to the rest of the data. I gave the 125MB for the Netherlands on a total of a 1.8GB map file, where 1+GB is map data. Also becasue the maps that are used within Brouter are by (big) regions, but are much smaller because they do not contain all that additional map and address data (and are compressed?).
Of course 125MB is a lot of data. And yes, it contains all "highway" tagged lines in OSM. However, highways have additional tags like footway, bridleway, steps, etc. These are not used for car routing. Another tag can be "designated" being only for cyclists, pedestrians, cars (or combinations like pedestrians and cyclists), etc. So for car navigation this 125MB (for the Netherlands) is entirely queried, but filtered, and therefore not entirely used for car navigation. Additional filters inside OsmAnd is to block unpaved roads, or ice roads or ferries, etc. further reducing the amount of "to be used" data. Hoi, Harry -- You received this message because you are subscribed to the Google Groups "OsmAnd" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/osmand/CAGARPptJg-Cd9Z_ZbZY2gjMYbW9HQRMfK%2BqRt-wDvgVG9ffe5Q%40mail.gmail.com.
