[OSGeo-Discuss] 30m SRTM worldwide?

[Seb]

Hi,

The Aster DEM has 30m posting and covers most of the globe.

http://free-gis-data.blogspot.com/2009/04/aster-global-digital-elevation-model.html

Also

http://www.terrainmap.com/rm22.html

However, as I understand it, the the most recent version of the STRM,
despite a 90m grid, may give you better details especially on flatter areas
with greater cloud cover than the ASTER withs its 30m posting. The ASTER may
have the edge in areas of sharper relief. I can try dig out the technical
reasons if you like.

We've downloaded large amounts of both with not too much hassle.

HTH

Seb

Cheers

Seb





On 22 August 2011 12:11, Carsten Troelsgaard <troelsgaard53c at live.dk> wrote:

>  hi seb and sembale
>
> The link provides two links:
> NASA’s EOS archive <http://asterweb.jpl.nasa.gov/gdem-wist.asp> or Japan’s
> Ground Data System <http://www.gdem.aster.ersdac.or.jp/index.jsp>
> both probably contains the data, but it's a lousy quality and not worth the
> download .. and the registration at EOS is rather strict
> The best DEM I've got is 90m via http://srtm.csi.cgiar.org/
> and their server is overworked and won't let you take more than a couple of
> tiles.
> There's a few 30m tiles at http://www.viewfinderpanoramas.org/
> if memory serves me right
>
> Carsten
> ------------------------------
> Date: Mon, 22 Aug 2011 10:25:53 +0100
> Subject: Re: [OSGeo-Discuss] 30m SRTM worldwide?
> From: sebhudson at gmail.com
> To: discuss at lists.osgeo.org
>
>
> You could try here
>
>
> http://www.opentopography.org/index.php/blog/detail/comparison_of_aster_gdem_to_srtm
>
> On 22 August 2011 10:22, Sylvain Maillard <sylvain.maillard at gmail.com>wrote:
>
> 2011/8/22 maning sambale <emmanuel.sambale at gmail.com>
>
> Dear Sylvain,
>
> The USGS site, provides ~30m SRTM only for the US.  I'm looking the
> 30m worldwide coverage. That was mentioned in the link I provided.
>
>
> In fact the SRTM data is available at 1 arc-second for the US, but there is
> only 3 arc-second data fot the global coverage !
>
> see http://eros.usgs.gov/Find_Data/Products_and_Data_Available/SRTM on
> section "SRTM Data"
>
>
> regards,
> Sylvain
>
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> --
> Seb Hudson
> +44 (0) 1970 625368
> +44 (0) 7811 268789
>
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-- 
Seb Hudson
+44 (0) 1970 625368
+44 (0) 7811 268789
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