Category Archives: Uncategorized

Another neat visualisation of map edits from ITO!

This is another very pretty visualisation of map edits from ITO!

IT shows the growth in edits and also the source timeframe. Each new colour band is 6 months worth of editors and the small natural decline over time offset by the massive growth.

Below the main chart is the relative contribution of each set of 6 months worth of users. So for example you can see the very first set of 6 months worth is now a very small proportion of the contributors overall. For more, see the flickr page here:


Project of the week – keepright (bugs in OSM) and a howto video

This weeks project of the week is keepright, a automagical bug system which highlights a range of errors in OpenStreetMap. So get involved and fix things near you. If there aren’t any bugs near you, there are many around the world and especially in the US to be fixed.

Here’s a howto video on using the system:


OSM recent contributors graphic

Check out this graph of contribution:

It’s built, as explained here:

In the new draft OpenStreetMap Contributor Terms, an ‘active contributor’ is defined as:

a contributor (whether using a single or multiple accounts) who has edited the Project in any 3 calendar months from the last 6 months (i.e. there is a demonstrated interest over time) …

This is a visualisation of the edits of the 8173 ‘active contributors’ (as of 1/2/2010) across the last three years. For each contributor a mark is placed along a horizontal line under each day that they contributed an edit. At the top are contributors with almost daily edits (within the last six months) and, at the bottom, those that only just meet the criteria. The vertical axis has been scaled from 8173 to 1600 pixels. There is a fairly strong correlation between recent and historical edit intensities.

This was calculated from the planet changeset dump, and assumes that a changeset was edited on every day if it was open for more than one day (rare). It regards each user id as an individual, so does not take account of a contributor using multple user accounts.

OpenGeoData is moving, might lose content, update your RSS & bookmarks

OpenGeoData is moving to posterous and so your feeds will move. The blog URL itself will remain static –

Now that the feeds are with feedburner, they should remain static (they haven’t moved in 4 years so far anyway).

WordPress has become too much of a PITA to manage for many reasons and posterous is just a pleasure to use. Unfortunately the wordpress to posterous import is not complete yet though. The basic problem is that in lots of posts here on opengeodata, we link to content (like podcasts and pictures) which reside here on opengeodata. Posterous isn’t clever enough yet to grab all of those things and host them… so if I did the import and then changed the domain over, we’d lose all of that media. I have unsuccessfully asked for help fixing this with a script and using the posterous and wordpress APIs or something.

Thus unless anyone wants to help, this entire blog is going to move to and will be mothballed. A new blog will appear at powered by posterous. Anyone with existing accounts who wants to post to the new blog should get in touch, it’s all pretty easy. The good news is that we can at any point in the future import the old content, or at least I hope so anyway.

So long, and thanks for all the maps!