I'm compiling some research into ways in which we can think of a map as
complete and how complete OSM is. I was just wondering if anyone had any
thoughts on the topic. My initial ideas have been posted on my blog
http://edwardmjohnson.wordpress.com/ and I will continue to update this until
I'm satisfied I know everything there is to know about the completeness of the
map!
One of the most interesting parts is how can we quote completeness of the map?
My first thought was a stage system as quoted below
* Preliminary stage - GPS tracks gathered or area has yahoo imagery.
* Stage 1 - Nodes and ways mapped onto OSM using GPS track or aerial imagery.
* Stage 2 - All roads named and roughly categorised
* Stage 3 - Map good enough for satellite navigation. All one-way streets, and
restrictions tagged along with accurate street categorisation.
* Stage 4 - All POIs (i.e. post boxes, bus stops, pubs, restaurants,
supermarkets etc.) tagged.
These stages may or may not occur in sequential order and each stage can be
quoted complete in terms of percentages. For example we might say that London
is 100% complete for Preliminary and stages 1 and 2, but only 60% stage 3
complete and 20% stage 4 complete. The hard question is how do we accurately
measure these percentages.
What are other people's ideas?
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