[OSM-newbies] Data source

[Richard Weait]

On Wed, Jul 28, 2010 at 9:29 AM, Richard Weait <richard at weait.com> wrote:
> On Wed, Jul 28, 2010 at 9:20 AM, Maitham <albakry77 at yahoo.com> wrote:
>> Hi
>> Does anybody know how can I get the source of OSM data? e.g. if it is
>> captured by GPS or traced from satellite images
>
> Dear maythm Al bakri,
>
> Data in OSM will include material referenced from personal surveys,
> perhaps including GPS, traced from satellite and other aerial imagery,
> from dead reckoning or personal knowledge and from imports from other
> sources.  The source of any specific sub-set of OSM data may still
> include multiple sources through the history of that data sub-set.
>
> The source of any specific object might include a source= tag, to give
> you a hint of the source, but that tag is not mandatory or may be out
> of date.

Also checking the history of an object and reading the change set
comments may provide additional clues.

> Best regards,
> Richard
>