[OSM-Talk-ZA] Question about Bing satelite images offset

[Glen Wilson]

There are already some GPS traces in Rustenberg (you can download them 
in JOSM). They look like enough to get the imagery aligned properly 
(offset I got is 15.67; -14.89), and once you've done that then the OSM 
data seems to line up quite nicely.

Offset and rotation: Yahoo imagery also seems to have offset in some 
places; sometimes imagery (Bing and Y!) is sometimes rotated (so it 
lines up nicely in some places, and badly in others).

To make sure everything is lined up I normally get some GPS traces and 
align the imagery to that, then I check alignment again when I move to 
the next suburb.

It's possible that sometimes the person who created the OSM data used 
misaligned imagery (curse those offsets)!

Later -- Glen

On 21-Jul-11 09:42, Tomas Straupis wrote:
>> Which is correct - the current OSM streets or the Bing Images.
>    GPX traces (especially those on an open area and not between buildings).
>    If an area has no GPX traces, it would be better to drive through
> and get at least some traces in order to adjust Bing images.
>
> P.S. Bing images are known to have a large offset in some places.
>
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