[OSM-newbies] Data precedence: Yahoo or GPS?

[Dave Stubbs]

On Mon, Jun 23, 2008 at 12:00 PM, Victor Snesarev
<victor.snesarev at gmail.com> wrote:
> I am starting to use a GPS to map trails (highway=footway) around town. Some
> of the trails or sections of a trail are also visible in the Yahoo imagery.
> When there are disagreements between my GPS track and Yahoo imagery, which
> one should take precedence? I am guessing Yahoo, but want to confirm this
> with the community.
>
> For an example see this footpath in Edit mode:
>
> http://www.openstreetmap.org/?lat=35.75856&lon=-78.78667&zoom=17&layers=0B0FT
>


That depends. Sometimes the Yahoo imagery can be offset a bit, in
which case you trust your GPS. Also the imagery is often not exactly
top-down, some places this is more obvious than others -- this means
that hills can make straight roads look curved when they're just
humped.
But in this case the imagery seems to be in the right place, and your
GPS trace went under some trees... so I'd probably trust the Yahoo
more.

Dave