[Live-demo] Still add some demo data?

Hamish hamish_b at yahoo.com
Tue Jul 27 12:52:51 PDT 2010

Johan Van de Wauw wrote:
> In that case maybe some raster data should be added to the
> mix: the only raster which is available now is an already
> rendered image, which is not very useful if you want to show
> some raster processing capabilities.

for my 2c, I like the idea of including a SRTM tile or two
for raster GIS programs to use in their tutorials. We could
do something like the OSM data symlink where the actual 1-degree
tile could follow the host city but the symlink would keep a
constant filename for the tutorial docs to use.

I like the idea of including some host-city specific data,
it gives the workshops/tutorials/disc release a bit more of a
relevant & local flavour. IMO when putting together a tutorial
you do well to either use "local" data or allow the users to
download data covering their home, as then what they see on the
screen will be familiar and less abstract for them, so you hold
their interest better.

> Perhaps too late for this edition, but later the global
> elevation could be added.

problem is for any sort of hi-res data the size of it gets too
huge for the disc. A step which uses WMS to download a local
chunk from NASA's OnEarth server or so might be a solution.

ETOPO2 is 85mb compressed, maybe ETOPO5 would be not-too-huge?

> This and some other global raster datasets can be downloaded
> from this site (we should check license etc.. though)
> http://www.worldclim.org/current

for a big list see also

the US govt/NASA data is always good because it is without

> Anyway for the time being I've kept my example using our
> own dataset.
> > (It's just a file of halve a megabyte, so size
> > shouldn't be an issue)

(it's not an issue, the volcano quickstart looks very nice!)
I'd be happy to use that Mt. St. Helens srtm tile as the
standard GIS disc demo DEM.

Crater Lake is another "classic" bit of topography for geo-
tutorials. In my last SRTM one I used the volcano used for Mt.
Doom in the movies :)



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