[OSM-newbies] data age

[Hermann Peifer]

Augusto,

The details and history of individual OpenStreetMap (OSM) features can 
be checked as follows:

- go to http://www.openstreetmap.org/
- zoom to your area of interest (the smaller it is, the better)
- click on the [+] in the upper-right corner of the map
- enable the data overlay
- follow the instructions in the side bar that opens
- at the end, you should be on a similar page like this one with all 
details for a given node, way or relation: 
http://www.openstreetmap.org/browse/way/25905090

For a more comprehensive overview in a given area of interest, you 
probably have to make yourself familiar with one scripting language or 
another. You don't have to be a programmer in the strict sense, I would 
say. I am myself not a programmer, but I managed to read through all 
European OSM data as provided in daily updates through 
http://download.geofabrik.de/osm/europe/.

In my small exercise, I checked the last modification timestamp of ~2 
million OSM highway features. Some 50% of them have been last modified 
in 2010, about 25% have been last edited in 2009 and another ~25% in 
2011. There are also some traces of OSM highways with older modification 
timestamps. See this screenshot for a summary of the results: 
http://www7.pic-upload.de/26.06.11/6au9q7ja8ny.png

Hope this helps, Hermann



On 22/06/2011 22:08, Steve Coast wrote:
> can someone help?
>
> On 6/22/2011 1:06 PM, A. Jouvin wrote:
>> thank you for qucik response.
>>
>> I am not a programmer, and I did not understand. What is OSM and how /
>> where to get it
>>
>> thank you
>>
>>
>>
>> On 22 Jun 2011 at 12:41, Steve Coast wrote:
>>
>>> datetime is attached to every object in OSM
>>>
>>> On 6/22/2011 12:30 PM, A. Jouvin wrote:
>>>> Stee
>>>>
>>>> Is there a way of knowing how old the data is in the maps? So as
>>> to access how accurate it
>>>> may be?
>>>>
>>>> For example the direction of a street. If it is too old, it may
>>> have changed.
>>>> regards
>>>>
>>>> Augusto
>>>>
>>>>
>>> --
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>>>
>> Ing. Augusto Jouvin
>> SKYTEC S.A.
>> www.garmin.ec
>>
>>
>>
>