[Talk-in] national parks

[Kenneth Gonsalves]

On Friday 02 Apr 2010 11:11:29 am Kenneth Gonsalves wrote:
> On Friday 02 Apr 2010 10:57:31 am PlaneMad wrote:
> > I had compared landsat lakes in chennai and found the offset error to be
> > around ~20m max. But in this case it looks like its around 100m. Given
> > the low resolution, seems understandable.
> > 
> 
> the yahoo satellite imagery is much more accurate - unfortunately it is at 
> such low res that it is almost impossible to trace.
> 

on zooming right in with josm, I find that there is actually not much of an 
offset in the landsat images. There is a grey area around the lake which is 
actually not lake at all. The actual lake is a much darker blue. So I was able 
to get the road out of the lake (or rather the lake out of the road).
http://www.openstreetmap.org/?lat=11.33471&lon=76.60931&zoom=17&layers=B000FTF
-- 
regards
Kenneth Gonsalves
Senior Associate
NRC-FOSS
http://certificate.nrcfoss.au-kbc.org.in