As a follow up. wiki page is at: http://wiki.openstreetmap.org/index.php/Completeness_Metrics
Cheers Andy >-----Original Message----- >From: Andy Robinson (blackadder) [mailto:[EMAIL PROTECTED] >Sent: 30 April 2008 4:41 PM >To: '[email protected]' >Subject: UK metrics basis - How complete is your area? > >Following on from Frederik's earlier snapshot statistics for Europe I >thought I'd work out a hopefully more reliable measure basis for the UK. >Hopefully it will help people evaluate their own areas to monitor progress. > >The evaluation was done for the area of Sutton Coldfield and adjacent wards >running towards Birmingham. A total of 10 wards in all. This area I know is >completely mapped out. I ended up with the following data: > >Population from ONS = 252,870 >Occupied Households from ONS = 106,068 >Total land area from ONS = 93914 (m2)(thousands) >Area of Road from ONS = 8976 (m2)(thousands) >Length of highways in OSM database = 836,035m (Anything lesser than >"service" was ignored) > >So, the two main metrics I plan to use are: > >Assuming average road width (from above) is 10.74m then the "Area of Road" >from ONS can be roughly transcribed to the total length of road for a given >area. > >There is 3.306m of road per head of population. > >Obviously these figures are only going to work in urban conurbations in the >UK, but hopefully they provide a basis from which to estimate progress. > >I'll knock up a wiki page with how I went about all of this. > >Cheers > >Andy > > > _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
