[OSM-talk-be] interesting map of contributions

[joost schouppe]

Marc,

It does not necessarily mean most roads were adde by one person. Several
reasons:
- the map shows all "way"s, which includes all land use as well
- the map show the latest contributor, which can be different from the
person who first added the way

That said, in fact a <lot> of data was put by just a few people. The user
you have in mind is probably lodde1949 ,who has added a tremendous amount
of information. With ITO maps ( eg
http://www.itoworld.com/product/osm/map?colour=table&area=7083:4&sort=total-&show=user:48476
)
you can see which user last touched the ways in a given area. In the area
Lodde works on, it's hard to find ways he didn't last touch.

The ITO map is also pretty cool to quantify how many different people added
how much info to the map. In cities, often 20-30% comes from just one
person; 80% form less than 10 people. That doesn't mean so few people
contributed: people who added info a long time ago are probably gone from
these kinds of analysis; some data isn't counted, and the last percentage
point of data is probably the most important one to make a good map great.

If you want identify single contirbutors contributions, you can also use
http://www.yosmhm.neis-one.org to visuelaize the area where they work, and
http://hdyc.neis-one.org to quantify that work.

Regards,
joost schouppe
(I hope this mail is sent the right way; it's my first to a mailing list
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