The OpenStreetMap project will possibly finalize its license change on April 1st 2012. There are certain concerns in the community about possible data losses and to keep them as little as possible, several remapping activities have been started. A really nice overview of “Remapping principles” and “Tools to help you” can be found here.

Frederik’s OSMInspector (OSMI) and Simon’s CLEANMAP are two very handy remapping tools. Both display data that will likely be removed after April 1st due to the fact that this data was collected by contributors that did not accept the license change. In Germany you will find several areas that are affected by these changes and might even leave some new blank spots in the map. But what impact do these changes have on the total length in kilometers per street category in Germany?

You can find several files regarding the OSMI license change view at a Geofabrik server here. Based on the “ways” shape file that you can find there it is possible to calculate the total length of the ways, which will likely be removed with the license change. However, sadly the “ways” shape file does not include any “highway” attribute, but luckily it includes the OSM IDs. This means that to be able to do a Germany street network analysis you will have to download the Geofabrik Germany OSM *.pbf file. By applying a short script you can get all OSM way IDs in Germany with their highway=* key/value pair. Combining these with the “ways” shapefile allows us to calculate the total lengths of each highway type for “Germany” (based on the Geofabrik extract!).

The following image shows the results of a first attempt to visualize the values per street category. Overall this means that based on the current (January 15th 2012) license agreement/disagreement situation about 5.4% (94000 km) of the current street network in Germany will be removed after the license change in April. The relative difference for each highway type lies between 3-8%. Last week (Jan. 7th, 2012) the total amount in Germany was 5.9% and 103000 km.

The OSMI License Change view contains not only the data that will potentially be removed in the future but also some information on two additional feature-types: Features, which have been modified and features which have been modified in some minor way by a contributor that declines the license change. In the first case we have a total street network length of about 58000 km that is affected and in the second case about 17000 km. Remember, these numbers only reflect the situation in Germany! You can find more information about the different feature types here: “Understanding the Colour Scheme“.

Notice: This was a short hack done last night, but I think those numbers look realistic. Can anyone confirm this for Germany? I am very curious how and if these numbers will decrease in the next few weeks. What do you guys think?

thx @ maɪˈæmɪ Dennis

My last blog post about the growing agreement to the new CTs is now nearly three months ago. Time for a short update: During the aforementioned time frame, about 32 contributors accepted the new CTs every day. Overall this means that since October 21 2010 there are about 43 contributors each day who accepted the new CTs. I updated my diagram with the latest numbers:

In December I conducted an analysis about the “Change of OSM object numbers through relicensing”. This time I only declared the last modifier of an OSM object (node/way/relation) as the owner of the object! The last and the new results can be seen in the following diagrams:

In my OSM-user-database of March 9th, 2011 a total of 120456* members are the “owners” of the following OSM objects (* Notice: Not every member of the OSM project (>350000 members) has contributed!):

• Number of nodes: 1007604532
• Number of ways: 85365727
• Number of relations: 899145

As of March 9th, 2011, 8124 Users have accepted the new license. 35678 new OSM members (uid >= 286582) have accept the new contributor terms automatically. I created the following numbers of OSM objects, which will be available for relicensing (if you assume that the last modifier is the owner of the object):

• Number of nodes: 801700665 (79,56%) (as of Dec. 15th, 2010 it was 66,52%)
• Number of ways: 66236798 (77,59%) (as of Dec. 15th, 2010 it was 61,68%)
• Number of relations: 716130 (79,65%) (as of Dec. 15th, 2010 it was 62,14%)

Are you still interested in any analysis regarding this topic?

thx @ Dennis

[Update – March 24th, 2011]
The following diagramm shows the above numbers of March 9th, 2011 in percent:

In the past I did some blog posts about the “Growing agreement to contributor terms” here and here. Both posts showed the amount of OpenStreetMap contributors who accepted the new CTs every day during each time frame (about 55 contributors a day). I created a new diagram that includes the past four weeks:

Overall for the past month about 57 accepted the new CT every day. This is nearly the same amount as during the months that have been analyzed before. But what does this exactly mean for the relicensable OSM data? Almost 2 months ago I did a post about the “Change of OSM object numbers through relicensing”. At this time there were about 55% of all OSM Nodes and 47% of all OSM Ways available for relicensing (you can find my post here).

I repeated this analysis with the current OSM data: In the first attempt I used the last modifier of an OSM object (node/way/relation) as the owner of the object. During the second analysis I used the creator (version=”1″) as the owner of the object.

In my OSM-user-database of 12/15/2010 a total of 111310* members are the “owners” of the following OSM objects (* Notice: Not every member of the OSM project has contributed!):

• Number of nodes: 878201891
• Number of ways: 73825397
• Number of relations: 790100

(Current status of the OSM database statistics are here)

As of Dec. 19 th, 2010 (16:00), 6076 Users have accepted the new license. 25487 new OSM members (uid >= 286582) have accept the new contributor terms automatically. I created the following numbers of OSM objects, which will be available for relicensing (at the above mentioned date of my data). If you assume that the last modifier is the owner of the object: (the numbers in brackets represent the percentage of the total objects!)

• Number of nodes: 584163816 (66,52%) (as of 10/10/2010 it was 55,89%)
• Number of ways: 45536248 (61,68%) (as of 10/10/2010 it was 47,56%)
• Number of relations: 491014 (62,14%) (as of 10/10/2010 it was 31,06%)

I did the same analysis with a second dataset in which the creator (version=”1″) is also the owner of the OSM object (my table is based on the full-history-dump of October 22, 2010). A total of 109005 members created:

• Number of nodes: 911411022
• Number of ways: 75235513
• Number of relations: 1151219

And the following numbers of OSM objects (version=”1″) will be available for relicensing:

• Number of nodes: 586598103 (64,36%) (as of 08/01/2010 it was 54,24%)
• Number of ways: 44844834 (59,60%) (as of 08/01/2010 it was 46,78%)
• Number of relations: 480370 (41,73%)

Notice: The last numbers of OSM objects could contain deleted objects too. I only checked and counted the version=”1″ of a object. So probably the numbers for relicensing OSM objects (version=”1″) should be smaller!

However, in my opinion the results are interesting enough to publish them here anyway.
Can anyone confirm these absolute numbers?

thx @ dennis !

Most of you know that OSM will change its license. This means that all data of the OSM project must be relicensed and therefore the contributors have to accept the new contributor terms. Some information about the new ODbL license can be found here.

Since October 9th or rather 10th there is a list of OSM member accounts available that have agreed to the new license. Here you can find Richard’s announcement in the OSMF blog and Matt’s announcement on legal-talk@openstreetmap.org.

Based on my “How did you contribute to OpenStreetMap?” database and the just mentioned “agreed users” list, I created some stats. Sadly they are (still) not up to date, but in my opinion interesting enough to publish them here anyway. In the first attempt I used the last modifier of an OSM object (node/way/relation) as the owner of the object. On the second analysis I use the creator (version=”1″) as the owner of the object.

In my OSM-User-Database of 10/13/2010 a total of 104354* members are the “owners” of the following OSM objects (* Notice: Not every member of the OSM project has contributed!):

• Number of nodes : 801562971
• Number of ways : 66719256
• Number of relations: 765276

You can find the current status of the OSM database statistics here.

As of Oct. 10 th, 2010 (00:00), 2831 Users have accepted the new license. 18054 new OSM members (uid >= 286582) have accept the new contributor terms automatically. I created the following numbers of OSM objects, which will be available for relicensing (at the above mentioned date of my data). If you assume that the last modifier is the owner of the object: (the numbers in brackets represent the percentage of the total objects!)

• Number of nodes : 448027992 (55,8943%)
• Number of ways : 31734455 (47,5642%)
• Number of relations: 237699 (31,0606%)

As I mentioned above, I did the same analysis with a second dataset in which the creator is also the owner of the OSM object (my table is based on the full-history-dump of August 1, 2010). A total of 98415 members created:

• Number of nodes : 796020493
• Number of ways : 63879479
• Number of relations: (numbers available soon)

And the following numbers of OSM objects will be available for relicensing:

• Number of nodes : 431778708 (54,2422%)
• Number of ways : 29885534 (46,7842%)
• Number of relations: (numbers available soon)

Remember, these statistics contain the TIGER import! If you extract this import, surely the percentage of nodes and ways are less, about 14% or even more? Maybe there a several data imports which have to be considered in the numbers? Has anyone else analyzed this before? However, I try to repeat these stats in the near future…

thx @ “the fabulous” dennis