Posted by: carlosgrohmann | June 30, 2009

ASTER Global DEM (GDEM) available!

Good news!

It was just announced that NASA/METI released today the 30m global (83degreesNS, ~22600 scenes) ASTER GDEM based on 1,264,118 single ASTER dems from 1.4 million scenes
in total. (95% vertical ci: 20 meters, 95% horizontal ci: 30 meters)

According to Hannes Reuter, “the link to the evaluation report will be probably be published today/the coming days. as i/we had the possibility to evaluate 5 tiles beforehand – from our analysis i/we can tell that you will run into some of the following:
step anomalies across mosaicing edges,
mole runs,
sinks (we observed some down to 180m below the surrounding),
artifical mountains (up to 200m),
non existing water mask,
in case only a couple of images n

Since a large traffic is expected in the first days, restrictions of 100 tiles apply and only 16 connections at the same time are allowed.

Concept of ASTER G-DEM development (credit: METI/NASA)



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