Tag: Stats

The State of the Map. United States. Street Network. 2013

Last year we wrote a journal paper in which we analyzed the OpenStreetMap (OSM) dataset of the United States which was published on May 28th, 2013 in the Transactions in GIS Journal. You can download a free pre-print version here. This paper has been published just on time to add to the discussion at the upcoming State of the Map United States conference which will take place in San Francisco and includes some presentations about data imports to OSM. Unfortunately, Dennis and I cannot attend the conference this year, so we decided to write a blog post with some additional and up-to-date numbers.

Add a Note in OSM … Stats & Personal Profiles

Since April 23th, 2013 each visitor, user or contributor of the OpenStreetMap (OSM) project can “add a note” to the map in order to easily mark an error or missing object in the map data. You can find more information about this new feature in the OSM wiki. It is a great new way for people to contribute to the project by improving the data in a simple way. To provide a better overview I created a new webpage which shows some statistics about the new feature. You can find it here: resultmaps.neis-one.org/osm-notes

Besides some general information the webpage also shows the overall, opened and closed number of notes per country. The second table illustrates the OSM contributors who already opened, commented or closed a note. All tables on the page are sortable by clicking on the column headers.

Introducing OpenStreetMap Contributor Activity Areas

One month ago I wrote a blog post about a new website which allows you to see other OpenStreetMap contributors in your area. Overall the feedback was very positive, thank you very much for that! However, now it is time for a new extension to the “How did you contribute to OpenStreetMap?” (HDYC) webpage. As I mentioned in my last blog post, I used an algorithm (which is described in a paper that I wrote here) to compute and determine the activity area of a contributor based on her/his changeset centers. The following figure shows the new function that was added to the HDYC website visualizing the activity area of a contributor! Sorry Harry, as always you have to be our guinea pig, but you have a really awesome activity area 🙂

OSM-Gravatar, Changeset changes & Way-Tags @ HDYC

After my latest updates to the “How did you contribute to OpenStreetMap?” website, some users asked me if I could add the new OSM gravatar to it. Starting today, you can find your OSM-gravatar from your OSM user website on HDYC too. If your HDYC-profile doesn’t show a gravatar yet, please be patient. It will be automatically updated as soon as you make any type of OSM edit to the OSM database. The following figure contains all updates that were made to the website marked with a circle. As always, Harry is our example 😉

As a second update, I added the number of changes that were made in a user’s changeset and grouped them into three classes. This way the website shows if a user only makes a lot of changesets with 15 or less edits, more than 150 edits or something in between. Last but not least, you can find some additional information about the number of ways of which the user is the last modifier, including its way tag. This provides some information about the data collection tendency of the contributor, for instance if the user only creates a lot of buildings or large landuse areas.

Overhauling “How did you contribute to OpenStreetMap?”

My last update about the HDYC website is a few months old now. For those readers who do not know what HDYC is: “How did you contribute to OpenStreetMap?” is a webpage which shows you in detail how long, when, where a member of the OSM project contributed to the project and which tools she/he used.

This time I added some new stats and graphs to the site. One of my favorite new features is the location information which shows the countries in which a contributor created at least one OSM Node:

A second new feature shows how long the mapper is already registered with the project and how many *active* mapping days she/he had:

You can also find some more information about the changesets of the user e.g. the number of changesets with a comment, the number of unique changeset comments and the median character length of the comments. Additionally, you will also see some information about deleted nodes, ways or relations:

I Like OpenStreetMap (OpenLayers Plugin)

A few months ago, Frederik Ramm posted an idea on the German OpenStreetMap mailing list about a new (stochastic) approach to OSM data quality assurance. You can find his original German post here. His idea was to create a way to allow users to “like” or “dislike” a specific region on the OSM map, a function that other popular websites such as YouTube or Facebook implemented to allow users to provide feedback to videos or status updates. For OSM this particular function could give some indicators or trends about the OSM map data.

I really liked his idea and in collaboration with Frederik I created an Open Source OpenLayers plugin. For all new readers: OpenLayers is an Open Source library which can implement a dynamic (OSM) map into more or less any webpage. One of our goals was to make the integration of the ILikeOSM plugin as easy as adding a tile server to your OpenLayers map.

Where are the new OpenStreetMap Contributors?

Since past Friday the OpenStreetMap project has more than 600 000 registered members. As many of you may know, not every new registered member starts contributing to the project right away. Based on my “How did you contribute to OSM?” database I created a small (but neat) webpage which shows where the newest registered OpenStreetMap (OSM) members made one of their first edits. The following image shows a screenshot of the new webpage:

The visualized data will be updated on a daily basis. At the moment there are two layers available: one layer displays the latest members of the past two days, while the other layer does the same for the past seven days. At lower zoom-levels the icons are clustered and only show the number of new members. However, on higher zoom-levels you can click on the individual icons to get further information about the new project member. Thanks to Stamen for their really nice looking watercolor map. Would you like to see more statistics about the number of new contributors for each individual country?

What type of Mapper are You?

Last weekend Frederik and Richard asked me if I could give some additional information on the „How did you contribute to OpenStreetMap?“ webpage. So here we go. Below the prior, familiar chart which shows the contributions per month, you will find two new charts. The first one shows the number of changesets per weekday and the second one the number of changesets per hour.

Additionally I added an output that roughly estimates what type of mapper the contributor is, based on his/her number of contributions (changesets). However, I will give no warranty regarding the group or type of mapper that each individual contributor falls into and I think you will figure out the different groups of mappers by yourself anyway 😉

The following picture highlights the new things on my webpage:

Most of you already know it, you will find “How Did You Contribute to OpenStreetMap?” here: http://hdyc.neis-one.org

OpenStreetMap in Germany (2007-2011)

Due to some requests by some German OpenStreetMap contributors, here a German blogpost about the results of the article: “The Street Network Evolution of Crowdsourced Maps: OpenStreetMap in Germany 2007–2011.” By Pascal Neis, Dennis Zielstra & Alexander Zipf. 2012. Future Internet 4, no. 1: 1-21. (doi:10.3390/fi4010001) Link: http://www.mdpi.com/1999-5903/4/1/1/

Bemerkung: Im Folgenden sind ausgewählte Ergebnisse und Diagramme aus dem englischen Artikel dargestellt/zusammengefasst. Bei weiterem Interesse bitte das Original Journal Paper lesen. Es beinhaltet bei weitem mehr Informationen und Abbildungen!

Das OpenStreetMap (OSM) Projekt ist das bekannteste Projekt im Bereich Volunteered Geographic Information (VGI). Weltweit beteiligen sich mehrere hundert tausend Mitglieder um Informationen für eine „freie“ Geodatenbank zu sammeln. Der Zuwachs der Daten ist weltweit recht heterogen, Deutschland zählt aber global zu eine der aktivsten Länder und die Anzahl der Projektbeteiligten steigt von Jahr zu Jahr. Aktuell (Juni 2011) haben insgesamt mehr als 40000 unterschiedliche Mitglieder zum Deutschland Datensatz beigetragen. Wie in der folgenden Abbildung zu sehen, haben unterschiedliche Mengen von Mitgliedern, die drei OSM Objektarten (Node, Way & Relation) in Deutschland erzeugt. Eine weitere wichtige Information ist in der Abbildung ebenfalls zu sehen: 98% der Punkte wurden von ca. 8500 Mitgliedern, 98% der Linien von ca. 7500 und 98% der Relations auf ca. 2600 Mitglieder generiert (wenn man den letzten Eigentümer als Ersteller bewertet).

OSM Routing View Worldwide 2011-11

Really great news for all our non-European OpenStreetMap.org Mappers: Since last month, the OSM Routing View is available for the whole world. You can read more in Frederik’s blog post. Yesterday he sent me the latest results of the view and I did some analysis with it. To all new readers: you can find more information about the OSM Inspector (OSMI) here. The Routing View within the OSMI “shows problems in the data, related to routing and navigation” (direct link).

However, here are the new *worldwide* stats for November 2011: we have a total of about 1,3 Mio errors. We can divide them into the following groups:

  • Unconnected 1 meter: 248000
  • Unconnected 2 meter: 62000
  • Unconnected 5 meter: 170000
  • Duplicate (number of duplicate segments): 833000

The following diagram shows the amount of errors per continent: