Geography Reference
In-Depth Information
Datenbank
Pixel-size/m
100
SRTM
WRS-2
(2000)
90
MSS
WRS-2
(June_1975)
60
TM
WRS-2
(May and
August_2007)
TM
WRS-2
(May and
August_1987)
30
TERRA-ASTER
VNIR
(May and
August_2005)
ETM+
WRS-2
(May and
August_2005)
15
0
Date/Year
1985
1990
1995
2000
1970
1975
1980
2005
2010
2007
1987
Fig. 4.1
An overview on the general characteristics of the used satellite dataset in the study
and ASTER makes them mainly suitable for LULC-studies for extended areas, such
as countries and continents. The largest part of Earth observation satellites that have
a medium resolution are in a sun-synchronous orbit. The LANDSAT data archive at
the USGS/EROS Center-holds an unequaled 36-year record of the Earth's surface
and is available at no cost to users via the Internet (Woodcock et al.
2008
). The
Earth Science Data Interface (ESDI) has a data archive with a global coverage, free
for download or for very low managing and delivery costs to large numbers of
countries around the world. The data-archive includes: ortho-rectified LANDSAT-
imagery from the three Sensors (MSS, TM, and ETM+); composite MODIS-
imagery; and remotely sensed data based derived products (e.g., NDVI). The owner
of this archive is NASA and it hosted at the University of Maryland in the USA. The
Earth Observing System Data Gateway (EOS) provides a big archive of land, water
and atmosphere data products. Also, the source of these data comes from NASA in
USA. There are also a valuable and gratis remotely sensed data or with an inex-
pensive shipping costs.
4.1.1 LANDSAT (MSS, TM and ETM+) Sensors
Lauer et al. (
1997
) provides a short history of the LANDSAT-program and its
noted successes. The development of the LANDSAT-program originated from
global efforts to improve our knowledge of Earth, and it is perhaps the most
successful satellite remote sensing program devoted to land monitoring. The first
Earth Resources Technology Satellite (ERTS-1) was launched to space on 23 July
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