On Tue, 2010-04-13 at 11:14 +0200, Claudius wrote: > Am 13.04.2010 10:48, Gregory: > > > > On 13 April 2010 01:26, Andrew Errington <[email protected] > > <mailto:[email protected]>> 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.
If it's the UK you're interested in then you should look at the newly released Land-Form PANORAMA data from the OS[3]. I've played with viewing it in QGIS and it looks fantastic. Some of the other data released might also be of interest for water body mapping. Keith. [3] https://www.ordnancesurvey.co.uk/opendatadownload/products.html _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
