[OSM-dev] Holes in contours

Dave Stubbs osm.list at randomjunk.co.uk
Sat Sep 13 15:16:14 BST 2008


On Fri, Sep 12, 2008 at 9:40 AM, Steve Hill <steve at nexusuk.org> wrote:
>
> On the piste map, I have some large holes in the contours for Canada.
> Initially I thought these were holes in the SRTM3 data itself, but I've
> noticed that the cycle map seems to have much better coverage of the area.
>
> Compare:
> http://www.openpistemap.org/?lat=49.6124&lon=-114.4173&zoom=14&layers=B000
> http://www.opencyclemap.org/?lat=49.61379&lon=-114.42141&zoom=14&layers=B000
>
> Is the cycle map still using the SRTM3 data for Canada, or is it using the
> higher resolution data sets that are available for North America?
>
> I haven't seen any similarly large holes in the contours for similar
> latitudes in Europe but I can't think of any sane reason why this problem
> would be restricted to Canada.
>

No, cyclemap is using the SRTM3 data same as everywhere else.

You look to be actually missing the contour lines themselves. Maybe
they didn't get inserted into your database properly.

Dave




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