Hmm, tough question. You might get a more representative number by adjusting a bit for changeset size, although I'm not sure if this is easily available in bulk data. It would give a more reliable metric at least.
On the whole it's hard to measure the impact someone has on the project though. Some people tirelessly keep the documentation wiki up-to-date, or paint bikesheds on the tagging mailinglist. Some fix bugs in JOSM, Carto, and anywhere that comes along their path. Some manage to get governments to agree to license valuable data sources for use in OSM (this one is potentially huge), and again others write JOSM plugins to unlock such data or to scratch a common itch improving the efficiency of hundreds of mappers.ยน
There is one mapper in the Netherlands who welcomes all new mappers starting of in the Netherlands: that's an invaluable service hard to quantify in data!
1: Or in my case, build a plugin that a dozen or so folk seem to use once a month. :P
You may have a look at http://hdyc.neis-one.org/?Stereo to try and find metrics relevant to you (example profile, to retain privacy profiles are hidden behind an OSM account login-wall, unless said user links to that page in their OSM profile site, which this example user did)
One great metric is mapping days (distinct calendar days in which the user was active) which sort of abstracts the fact that different people tend to have a different idea how much work warrants a single changeset.
The "How did you contribute" dashboard from Pascal Neis [0] is a good place to explore some possible metrics. IMO some good predictors of mapping quality are:
- Focus on specific regions
- Both creation and deletion of map features, but more creation than deletion
- Unique and descriptive changeset comments
- Engagement in changeset comment discussions, both of your own and others' changes
Any metric will have big problems. It is like attempting to measure output of programmer by counting number of commits, added lines, deleted lines, modified lines or time spend in office.
I made edits changing one tag that were far more useful and time-consuming than my other edits that added 9 000 objects.
On the whole it's hard to measure the impact someone has on the project though. Some people tirelessly keep the documentation wiki up-to-date, or paint bikesheds on the tagging mailinglist. Some fix bugs in JOSM, Carto, and anywhere that comes along their path. Some manage to get governments to agree to license valuable data sources for use in OSM (this one is potentially huge), and again others write JOSM plugins to unlock such data or to scratch a common itch improving the efficiency of hundreds of mappers.ยน
There is one mapper in the Netherlands who welcomes all new mappers starting of in the Netherlands: that's an invaluable service hard to quantify in data!
1: Or in my case, build a plugin that a dozen or so folk seem to use once a month. :P