Thank you everyone. Hello, I'm calling this talk OSM US Community Chronicles Exploring the growth and temporal patterns of mapping in OSM in North America Let's start with the picture. This year we're averaging about 900 active mappers each day, which you can see has grown considerably in recent years

How did we get here? This graph quantifies a mappers first edit in North America by month So for example in August 2009 1,700 contributors edited in North America for the first time and in January 2017

Close to 7,000 contributors edited in North America for the first time Let's put those numbers in a bit of context. Here's how we compare to the global OSM community And now break this down just a bit further based on when a mapper made their first North American edit

How long did they stick around mapping? I really like to use this measurement of mapping days as opposed to edits Meaning these are distinct days that a mapper has been active in this way. We're crediting mappers that are active Editing one or 100 objects the same each day

So this blue line now represents only the number of mappers who started mapping in North America and continued on to map more than seven days So Here's that first peak and we see that in August 2009 just over 200 of those initial 1700 mappers continued to map more than seven days in the coming 11 years and

Of the new 7,000 mappers that started in January 2017 Just under 500 of them stuck around for seven days or more As we increase the threshold we see here at this 30 day mark For example, the purple line represents mappers who stuck around for more than 30 days after their first edit in North America

Notably, we see significant growth since 2017 averaging about 50 mappers who start editing in North America each month and then continuing to map for more than 30 days So finally, let's look at how temporal patterns of mapping have changed over the years What time and on which days do mappers contribute to North America?

This violin plot shows the breakdown of what time of day in u.s. Eastern time mappers were actively mapping in North America in 2011 The line through the middle represents the median time for mappers active each day Meaning that most mappers were active around 10 a.m. Eastern time we see that in 2011

There was not much of a change in median editing time throughout the week Notice that between 5 a.m. And 11 a.m. Eastern time is the bulk of the editing where the area is the widest This feels a bit early for the u.s. Given. This is 2 a.m. On the west coast However, that is 10 a.m. In Europe

So I think what we see here in 2011 our European mappers active early in the day and the North American mappers coming online throughout the day Next we see here the median number of mappers active per hour for each day of the week in 2011 there was little variation between the days of the week with a median value of just under 20 mappers active hourly

And Finally, we see the number of mappers active per hour over the summer between July and September This is a fairly jagged line with little discernible pattern. Now, let's see how these patterns evolved throughout the years We had 2012

2013 2014 15 16 And Now in 2017 marks the beginning of a really discernible Weekly mapping pattern the top plot hasn't changed much the medians for each year are fairly similar We now have a median of about 50 mappers active per hour on weekdays

But markedly fewer on Saturday and Sunday our bottom plot now mappers active Over the summer is developing peaks and troughs where we have weekends with Lower mapping activity than during the week. So this is our new temporal mapping pattern starting in 2017. And let's watch how this grows

2018 we see those peaks and troughs are getting more extreme 2019 we start to see a change in the hours of the day that mappers are active in 2020 notably the shapes the violins on top have changed with a median Editing time of 3 p.m. For weekdays in the middle

We see more than a hundred mappers active per hour on weekdays with our fewer on the weekends and in the bottom We see extreme peaks and troughs with more than a hundred difference of a hundred mappers active per hour So that was a lot of information very quickly. Thank you. I want to put a plug in here for birds of a feather tomorrow

Calling it. How do we know what we know? So I'm inviting people to come discuss share Question and learn about different approaches to OSM analysis And I'm going to post all of these slides and the methods of how I did all this on my OSM diary So thank you very much. And thank you all for yeah. Thank you all for organizing this