Daniel,
The SRTM data has 90m cell size, while the CDED (from the Geobase
site) has 30m cells (and 1m height resolution) which might rendered
better contours.
Best Regards,
Brent Fraser
On 5/27/2011 11:52 AM, Daniel Begin wrote:
Bonjour tous le monde,
I have generated a 30m and 31m contour lines for Richelieu river and
lake Champlain (using SRTM data). It fits the 30m contour provided by
Jean-Guilhem but doesn't seem to fit pretty well the flooded wetland
area provided by Pierre.
Any idea if this data can be used (usgs licence point of view)?
And if it can be usefull?
Daniel
------------------------------------------------------------------------
*From:*Pierre Béland [mailto:[email protected]]
*Sent:* May-27-11 12:40
*To:* HOT Openstreetmap
*Cc:* talk-ca
*Subject:* Re: [HOT] [Talk-ca] Flooding in Richelieu River,
Quebec,Canada :Follow-up(Complement of information)
Jean-Guilhem Cailton wrote on 2011-05-27
> According to the shapefile data, Lake Champlain, and hence
Venise-en-Québec are above the 30 m elevation.
> The shapefile contains punctual elevations of 31 m in this area
(Plage Missisquoi, for example).
> The next contour line would be the 40 m one, but it does not look
like it would be very useful for this.
This is exact. The 40 meter contour line is not usefull for us.
Thanks Jean-Guilhem.
Pierre Béland
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