I'm just calculating some statistics for my local urban area (Northeast Birmingham). The area I've selected I know is 100% complete in terms of the road network because all of it has been systematically mapped by yours truly. I know the boundaries of the area and am about to pull the highway ways from xapi (ignoring footways, cycleways and tracks) so that I can get a metric of the length of highway vs the population and other statistics. I'll trim highways that leave the area in JOSM before I do this.
The population of the area is just over 250,000 (2.39 persons per household) and based on the 2001 census, specifically the population and other data from 10 parliamentary wards. The population will have changed a bit since 2001, as have the ward boundaries, but then again also some roads will also have been built in that time and I may have a few roads missing here and there. Overall I think assuming a 100% complete road network against this population should I think give quite a reliable measure for an urban area. The area includes both purely residential, some near conurbation rural and industrial areas, so it should be reasonably representative of other urban conurbation areas of the UK. Can someone point me to some simple code/ideas on how to turn the xml osm data into way length? I'll then be able to report some findings. I'll also write up how I gathered the information needed so that other areas can be compared. Cheers Andy >-----Original Message----- >From: [EMAIL PROTECTED] [mailto:talk- >[EMAIL PROTECTED] On Behalf Of Frederik Ramm >Sent: 30 April 2008 12:45 AM >To: talk@openstreetmap.org >Subject: [OSM-talk] OSM in Europe Statistics > >Hi, > > a very crude statistic: > >Country osm.bz2 size population ratio (bytes per capita) >-------------------------------------------------------------------- >UK 73M 60M 1.2 >Germany 110M 82M 1.3 >Netherlands 51M 16M 3.2 >France 29M 60M 0.5 >Finland 20M 5M 4.0 >Italy 14M 58M 0.2 >Norway 21M 5M 4.2 >Sweden 24M 9M 2.6 >Spain 17M 40M 0.4 > >I suspect that disregarding the coastline (which is included in my >figures) would probably cost the Scandinavian countries a few ranks in >this league. Coastline factor doesn't affect larger countries that much >(but still strange that Italy should have so little - must investigate >quality of border polygon). > >It is probably not unreasonable that once the road network is complete >in a European country, we'll look at a ratio not unlike the NL figure. >This would suggest that both the UK and Germany are about 1/3 there. > >Of course this is very simplistic and I believe you will come up with >much better measures of progress. Let's hear your numbers ;-) > >(Among other things, NL is known as a very densely populated place - UK >has 9 times the area of NL but only 3 times the population -, so those >map features that tend to fill the available land even if sparsely >populated will mean that the "destination bytes per capita" ratio for >places like UK or DE will be higher than 3.) > >Bye >Frederik > >-- >Frederik Ramm ## eMail [EMAIL PROTECTED] ## N49°00'09" E008°23'33" > > >_______________________________________________ >talk mailing list >talk@openstreetmap.org >http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
