OpenStreetMap 開放街圖
Average highway node distance between 2 points in OpenStreetMap - September 2015
於 2015年九月24日 由 baditaflorin 以English發表。I only get the data per continents, for some types of roads. for europe i only got them for 6 types, because osmosis is not able to load the whole Europe file, at least with a server that have 16 GB RAM and octacore processor. I had a deadline, and from my estimation would have took more then 2 days to load the whole europe, so i had used osmfilter and osmconvert to extract different types of highway types
討論
由 imagico 於 2015年09月24日 11時54分 發表的評論
In general node distance only tells one side of the story since there are fairly straight roads that require few nodes for accurate representation and curved roads that would be extremely inaccurate with the same node density. So it is usually best to also look at the average derivation angle at the nodes, see here for an example for that.
By the way - is that spherical/ellipsoidal distance or in mercator meters?
由 baditaflorin 於 2015年09月24日 17時11分 發表的評論
It is in EPSG 3857
Great idea, is in my to do list, but did not figure out the code to to that yet
由 Nakaner 於 2015年09月24日 19時50分 發表的評論
I think that a line plot as you used is not the best way to visualize your data. Such diagrams are good for plotting a variable y which is a function of a variable x. A set of bar diagrams (one per road class with one bar per continent) would be better.
You have the data. Could you just plot it again?
由 baditaflorin 於 2015年09月24日 21時43分 發表的評論
Hi @nakaner, thanks for the feedback, i will try to do it tomorrow, if not i will do it during the weekend.