[talk-ph] ASTER GDEM is now released for civilian use!

[maning sambale]

There are other RS/GIS methods to do ground-building height difference
measurements.
> Interesting. It's kinda expected that it will have poor data in places
> with skyscrapers. I don't think remote sensing is currently
> sophisticated enough to distinguish buildings from surrounding
> features.

Yes, ASTER does have higher resolution compared to SRTM
> But, basing on your visualizations, it *seems* that ASTER data has a
> higher resolution than SRTM.

Not yet (on my list).
> Have you compared in non-urban areas with
> dramatic changes in slope such as the Wawa Dam area? :)

But just keep this conversation going, I made another comparison this
time with ASTER GDEM V1 and V2.

http://www.flickr.com/photos/esambale/6305083493/
Caption: Improved masking on large water bodies for V2 of ASTER GDEM.
Comparison of interpolated contour of Aster V1 (green) and V2 (red)
over Taal Lake.

> On Tue, Oct 25, 2011 at 6:11 PM, maning sambale
> <emmanuel.sambale at gmail.com> wrote:
>> A quick gdal_contour and qgis overlay.  As expected, both data (SRTM
>> and ASTER GDEM V2) not useful for high-rise urban areas.
>> http://www.flickr.com/photos/esambale/tags/srtmaster/
>



-- 
cheers,
maning
------------------------------------------------------
"Freedom is still the most radical idea of all" -N.Branden
wiki: http://esambale.wikispaces.com/
blog: http://epsg4253.wordpress.com/
------------------------------------------------------