[OSM-talk] Contour lines

[Andrew Errington]

Hi all,

Is there a WMS layer or other data source for contour lines?  I am improving 
the outline of the water in a reservoir.  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.  Unfortunately, the 
reservoir is already partially rendered on OSM Cycle Map so it, and other 
features, obscure some of the contour lines.

Would it be useful to have a 'topolines only' map?  It wouldn't have to have 
features on it (as it can be switched in and out in Potlatch and JOSM), and 
it doesn't have to be rendered very often.

In this case I am happy with using the OSM Cycle Map as a background layer for 
tracing, especially as the new water shape is generally bigger than the old 
shape.  If the new shape was smaller, or badly drawn, or in the wrong place 
then I would not be able to see the contours underneath it on the OSM Cycle 
Map.

Comments please (esp. easier/better ideas),

Thanks,

Andrew