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Or in miles. How can you calculate the total road length for a country. Or a continent, or a city, etc etc I installed Qgis and learned to play a little with it. There i can select to have all roads except track. Or a lot of nice stuff you can do, but one thing that i cannot figure it out in Qgis is to calculate the length of a road. Or calculate the lenght of all the roads. So i can download once per week and do a query, so i can tell to people that this week we have added 200 km more or roads. |
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One option is to use this Perl script, which will calculate the length of roads in an OSM file: osm-length-2.pl For more details, see this post by Frederik Ramm on the talk mailing list: [OSM-talk] Statistics on road network length? Some of the other posts in that mailing list thread may be helpful. |
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Perhaps this question helps. I am currently waiting for someone to confirm that this is a good approach :) |
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For regular updates, Vclaw's answer is probably best. But I don't think what you were trying to do is difficult in qgis. Here's a tutorial. |
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There is a python package that does exactly that. It is basically a wrapper on top of Overpass that handles the calls. It supports country-size regions :) https://github.com/JoaoCarabetta/osm-road-length It is super easy to use, Install it: pip install osm-road-length And run: import osm_road_length from shapely import wkt geometry = wkt.loads('POLYGON((-43.2958811591311 -22.853167273541693,-43.30961406928735 -23.035275736044728,-43.115980036084224 -23.02010939749927,-43.157178766552974 -22.832917893834313,-43.2958811591311 -22.853167273541693))') length = osm_road_length.get(geometry) |
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osm-length-2.pl i cannot make it work and the other alternative, that i forgot right now what it was, the link it`s no more. |
