[talk-ch] Reliefs layers for openstreetmap.ch

Etienne Trimaille etienne at trimaille.eu
Tue Jan 1 22:45:09 CET 2013


Merci pour les explications Yves.

Si jamais tes sources avec un howto sont disponibles, je suis preneur ;-)
Je suis en train de me pencher sur mapnik en ce moment, je vais en avoir
besoin avec du relief.


2012/12/29 yvecai <yvecai at gmail.com>

> I downloaded SRTM v3 via the usual ftp, then, patiently, ASTER from
> http://reverb.echo.nasa.gov/**reverb/<http://reverb.echo.nasa.gov/reverb/>(that's doable).
> SRTM void are filled from Aster data with a homemade python script, then
> the filled void are smoothen with a 3x3 average filter.
> 1x1° tiles of hillshade, slopes are computed with gdaldem, then composed
> with imagemagick.
> A bif tiff in latlon is merged with gdal, then reprojected to 3857.
> Finally, a modified version of gdal2tile computred tiles from zoom 11 and
> store them in an sqlite.
> I'll took the time to put the scripts on github one day.
>
> Note: Sadly, the Matterhorn is wrong in Aster.
>
> Yves
>
>
> On 12/29/2012 01:22 PM, Stefan Keller wrote:
>
>> Salut Yves
>>
>> Nice job!
>> I hope the maintainer of www.openstreetmap.ch will read this post.
>> Just to be curious: How did you process the hillshades and from which
>> URL did you download the original data?
>>
>> Yours, Stefan
>>
>>
>> 2012/12/29 yvecai <yvecai at gmail.com>:
>>
>>> I hereby offer www.openstreetmap.ch to use on its web map the contour
>>> lines
>>> (isohypses) and hillshading overlay layers available at
>>> www.pistes-nordiques.org.
>>> The attribution must quote the following: "ASTER GDEM is a product of
>>> METI
>>> and NASA".
>>>
>>> Yves, webmaster pistes-nordiques.org
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