[NUUG kart] ASTER DEM fra NASA

[Trond Michelsen]

On Wed, Oct 19, 2011 at 10:58:14AM +0200, Knut Arne Bjørndal wrote:
> NASA har publisert et nytt høydedatasett generert fra ASTER-data:
> http://www.nasa.gov/topics/earth/features/aster20111017.html
> 
> Lisensen ser enkel og grei ut, fra
> https://lpdaac.usgs.gov/about/citing_lp_daac_and_data:
> «These data are not copyrighted»
> 
> De vil gjerne ha attribution, men i motsetning til tidligere
> distribuerte data fra Japan er det ingen begrenset liste over hva man
> kan bruke det til.

https://lpdaac.usgs.gov/lpdaac/products/aster_policies

ASTER Redistribution Policies for the General Public
Users of ASTER Global DEM Data Received from the LP DAAC

ASTER Global DEM (GDEM) data are subject to redistribution and
citation policies. Before ordering ASTER GDEM data, users must agree
to redistribute data products only to individuals within their
organizations or projects of intended use, or in response to disasters
in support of the GEO Disaster Theme. When presenting or publishing
ASTER GDEM data, users are required to include a citation stating,
"ASTER GDEM is a product of METI and NASA."

Because there are known inaccuracies and artifacts in the data set,
please use the product with awareness of its limitations. The data are
provided "as is" and neither NASA nor METI/ERSDAC will be responsible
for any damages resulting from use of the data.

Why are there restrictions on the redistribution of the ASTER GDEM?

The ASTER GDEM is a joint contribution by NASA and the Ministry of
Economy, Trade and Industry of Japan (METI) to the Global Earth
Observation System of Systems (GEOSS). As such, both METI and NASA
desire to understand the uses of the ASTER GDEM, expressed as one the
GEOSS applications themes: disasters, health, energy, climate, water,
weather, ecosystems, agriculture, or biodiversity. This requires both
the registration of users, and restrictions on redistribution, to
capture the intended use in terms of the GEOSS themes. These few
restrictions on the ASTER GDEM commenced with the public distribution
of tiles on June 29, 2009 and will continue through the life of the
mission. Public access to the ASTER GDEM requires registration and
acknowledgement of these restrictions at both the US and Japan server
locations. All registration is kept confidential and is used solely
for distribution metrics and possible notification of updates to the
ASTER GDEM.  

What restrictions apply to the redistribution of data?

The general principle is one of reversibility: If someone can recover
the original x-y-z values from the new product, then that new product
can NOT be re-distributed. This can also be defined as lossless
recovery.  

What are some examples of derived products that can NOT be
re-distributed?

   1. Transforming the data from GeoTIFF format to ESRI format
   2. Mosaicking or subsetting the data at the native (1 arc-second)
      or better resolution to serve up areas different than the
      original 1x1 degree tiles
   3. Changing the units from meters to feet

What are some examples of derived products that are re-distributable?

   1. Reprojection that involved re-sampling, including nearest
      neighbor in cases where the reprojection involves more than a simple
      translation of an integer number of GDEM pixels
   2. Creating a slope map
   3. 3-D perspective visualizations

Can "flyover" movies created using ASTER GDEM data be re-distributed?

Flyover movies may be re-distributed if the final product is produced
in a format that will not allow the recovery of the original data
(e.g., avi, Quicktime, wmv).

Can images created for publication or Web 2.0 applications (e.g.,
Wikipedia) using ASTER GDEM data be re-distributed?

Images that are created using GDEM data may be re-distributed through
publications or social media applications. Papers citing such articles
may be re-distributed as well.

-- 
Trond Michelsen