[mkgmap-dev] ASTER elevation data

Tue Jun 30 22:33:49 BST 2009

Dear Marko,

I already wrote a class to read SRTM data directly with mkgmap, i.e. 
without having to create the contours as separate (huge) files. Since 
I'm still testing it and I have to add some configuration stuff (path of 
directory containing data, distance between contour lines etc.), I have 
not posted it yet. It can already read the .hgt-format and the CGIAR 
GeoTIFFs (the latter requires java image io to be installed).
Since the ASTER files come as GeoTIFFs, I think it will be easy for me 
to read them (I will only have to adjust the tile size from 5x5 degrees 
to 1x1).

Best wishes
Christian

Marko Mäkelä schrieb:
> I came across this via Slashdot:
>
> http://asterweb.jpl.nasa.gov/
> http://www.nasa.gov/home/hqnews/2009/jun/HQ_09-150_ASTER_Topographic_Map.html
>
> Quoting the press release above:
>
> "Previously, the most complete topographic set of data publicly available
> was from NASA's Shuttle Radar Topography Mission. That mission mapped
> 80 percent of Earth's landmass, between 60 degrees north latitude and
> 57 degrees south. The new ASTER data expands coverage to 99 percent,
> from 83 degrees north latitude and 83 degrees south. Each elevation
> measurement point in the new data is 98 feet apart."
>
> This is good news for us North Europeans.  The north limit of the SRTM
> is a few hundred meters north from my home, about 30 km north from
> the Helsinki coast.
>
> Can anyone who knows the topography business take a look at this data
> and write scripts for translating ASTER elevation data and OSM with mkgmap?
> At the end of the above press release, there are a few links that ought
> to be useful for us:
>
>   
>> For visualizations of the new ASTER topographic data, visit:
>> http://www.nasa.gov/topics/earth/features/20090629.html
>>     
>
>   
>> Data users can download the ASTER global digital elevation model at:
>> https://wist.echo.nasa.gov/~wist/api/imswelcome
>> and
>> http://www.gdem.aster.ersdac.or.jp
>>     
>
> Best regards,
>
> 	Marko 
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