[OSM-talk] Contour lines

[Claudius]

Am 13.04.2010 10:48, Gregory:
>
> On 13 April 2010 01:26, Andrew Errington <a.errington at lancaster.ac.uk
> <mailto:a.errington at lancaster.ac.uk>> wrote:
>
>     I have checked Yahoo! aerials to see the nominal area of the
>     reservoir and I have chosen a particular contour line on OSM Cycle
>     Map to trace along with Potlatch.  This will give a
>     pleasing representation of the area covered by the water.
>
> Hey, hold it right there.
> What makes you think the Yahoo! imagery and/or the contour lines shown
> on the Cycle Map(these  contours are from SRTM data, not OSM) are more
> up to date or more accurate/precise than the existing water body drawn
> in OSM?

These thoughts set aside here's a SRTM contour tiles link: [1]

I suggest reading about SRTM as well [2] so that you can assess this 
data source. For example the 90m resolution outside the USA.

Claudius

[1] http://www.christeck.de/wp/2010/01/09/srtm-tiles-available-online/
[2] http://en.wikipedia.org/wiki/SRTM