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and Google Earth seems to have used the same data. I've got a mountain ridge that doesn't drop 150m in an area where I know I've walked and the GPS trace confirms it. Katoomba NSW Narrow Neck, along Castle Head towards Ruined Castle. I have printed topo maps I can reference, at a friends house.

asked 31 Dec '10, 17:46

Dave%20Rave's gravatar image

Dave Rave
accept rate: 0%

Just a hopefully useful side note: Since you mention topo and google's services and just in case you did not know: please note that we do not want to and are not allowed to add information from other maps (like google's) into our map data.

(13 Nov '13, 11:01) aseerel4c26 ♦

OpenStreetMap does not usually carry topographic data. If you see a map with elevation contours or hill shading, then whoever created that map from OpenStreetMap has added that information in from another source, possibly the free NASA SRTM dataset which might be used by other parties as well.

If you have a genuine bug report regarding OpenStreetMap, then OpenStreetBugs would be a good place to post it.

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answered 01 Jan '11, 11:06

Frederik%20Ramm's gravatar image

Frederik Ramm ♦
accept rate: 23%

no, not a bug first time asking because the topo data is showing (Base Layer : Cycle Map) and the contours don't go the way shown. just wondering where the data came from and is it fixable...

I note the Google Earth has used the same dataset with it's terrain, it shows wrong. silly Google.

(01 Jan '11, 16:52) Dave Rave

The Cycle Map layer on the openstreetmap map display is provided by and is based on openstreetmap vector data and SRTM elevation data. This digital elevation model has 90 meters resolution and is know to contain some errors. Apparently google uses the same data and therefore shows the same errors.

(01 Jan '11, 20:17) petschge

good answers, thanx. now i have an idea what i am looking at.

(03 Jan '11, 11:44) Dave Rave

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question asked: 31 Dec '10, 17:46

question was seen: 5,568 times

last updated: 13 Nov '13, 11:01

NOTICE: is no longer in use from 1st March 2024. Please use the OpenStreetMap Community Forum