[OSM-talk] line length stats

Andy Robinson Andy_J_Robinson at blueyonder.co.uk
Wed Aug 16 17:44:24 BST 2006


Doing a quick back of the envelope calculation using the stats data (when
compared with the stats of the planet file for July 3rd) I believe we
currently have approximately 225,000km of line segment east of the Atlantic.
If I apply the same crude basis to include the TIGER data I get a value of
around 2 million kilometres in total. These figures assume a rough
approximation of active as opposed to deleted segments of 90%.

Note also that the TIGER data probably has a different average segment
length to the 0.19km average seen outside the US. I wouldn't be surprised if
its longer which would put the total length up even higher.

Cheers

Andy

Andy Robinson
Andy_J_Robinson at blueyonder.co.uk 

>-----Original Message-----
>From: talk-bounces at openstreetmap.org [mailto:talk-
>bounces at openstreetmap.org] On Behalf Of Andy Robinson
>Sent: 16 August 2006 16:53
>To: 'Joerg Ostertag (OSM Munich/Germany)'; talk at openstreetmap.org
>Subject: RE: [OSM-talk] line length stats
>
>Joerg, that's great, thanks. So we have a July benchmark of 162,752km
>excluding the Tiger data, is that correct?
>
>Cheers
>
>Andy
>
>Andy Robinson
>Andy_J_Robinson at blueyonder.co.uk
>
>>-----Original Message-----
>>From: talk-bounces at openstreetmap.org [mailto:talk-
>>bounces at openstreetmap.org] On Behalf Of Joerg Ostertag (OSM
>Munich/Germany)
>>Sent: 16 August 2006 15:44
>>To: talk at openstreetmap.org
>>Subject: Re: [OSM-talk] line length stats
>>
>>On Wednesday 16 August 2006 16:11, Andy Robinson wrote:
>>> Anyone got or fancy hacking some code to calculate the total length of
>>live
>>> segments on the db. Would be useful for up and coming presentations to
>be
>>> able to quote some stats. I guess something of a working planet ideally?
>>
>>I can tell you about the current planet.osm as soo as this one is working.
>>So lets start focusing on getting the data inside the osm-server
>>consistent.
>>
>>> Also the split between Tiger and the rest (the rest being of interested
>>as
>>> that gives a good indication of how the manual editing process is going.
>>>
>>> Another quick and dirty way would might be to take a sample of the data
>>and
>>> work out the average length of segment and then just multiply that by
>the
>>> total number of active (i.e. no deletes) segments.
>>
>>> Anyone up for this?
>>
>>I changed check_osm to spit that out too:
>>it's in
>> OSM_errors_statistics-segments.html
>>
>>
>>planet-2006-07-a.osm :
>> Maximum Segment length: 24.43 Km
>> Average Segment length: 0.19 Km
>> All Segment together length: 162752.82 Km
>>
>>
>>-
>>
>>Joerg
>>
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>
>
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