DESCRIPTION OF THE SRTM DATA
The Shuttle Radar Topography Mission (SRTM) data products result from a collaborative mission by the
National Aeronautics and Space Administration (NASA), the National Imagery and Mapping Agency
(NIMA), the German space agency (DLR) and Italian space agency (ASI), to generate a near-global digital
elevation model (DEM) of the Earth using radar interferometry consisted of the Spaceborne Imaging
Radar-C (SIR-C). SRTM was the primary payload on the STS-99 mission of the Space Shuttle Endeavour
launched February 11, 2000 and flew for 11 days and successfully collected data over 80% of the landmass
of the Earth.
The SRTM data are available at resolution levels of 1 arc-second (~30 m) and 3 arc-second (~90 m). The 3
arc-second data (SRTM-3) is available globally and the 1 arc-second data (SRTM-1) is only for the USA
territory. The SRTM data can be freely accessed over the internet in 2003 (http://www2.jpl.nasa.gov/srtm/
or ftp://e0srp01u.ecs.nasa.gov) and in 2006 the second or “finished” version was released. The “finished”
SRTM data was edited to delineate and flatten water bodies, to define coastlines and to remove "spikes"
and "wells". The SRTM data contains numerous voids that can be filled by interpolation from surrounding
pixels. In forest area, the SRTM provide elevation data of the top of the canopy, with a slight penetration.
The SRTM data has absolute horizontal and vertical accuracy of 20 m and 16 m, respectively. The release
of such high quality DEM data to the public has totally revolutionised the concept of global topographic
mapping.
VOID-FILLED SRTM DATA OF PENINSULAR MALAYSIA AND BORNEO
The “finished” 3 arc-second SRTM data was used to construct the void-filled DEM of Peninsular Malaysia
and Borneo. The voids were filled by linear interpolation using the software 3DEM version 19.0 and
converted to GeoTIFF raster format that can be utilised in most GIS softwares. The DEMs are in
geographic (Lat-Long) projection and WGS84 datum. The GeoTIFF files available are as follows:
1) PMsia SRTM_V2.tif (compressed as PMsia SRTM_V2.zip, 21.8 MB)
DEM of Peninsular Malaysia. The height files (.HGT) used to construct the void-filled DEM are
N01E099.hgt; N01E100.hgt; N01E101.hgt; N01E102.hgt; N01E103.hgt; N01E104.hgt;
N02E099.hgt; N02E100.hgt; N02E101.hgt; N02E102.hgt; N02E103.hgt; N02E104.hgt;
N03E099.hgt; N03E100.hgt; N03E101.hgt; N03E102.hgt; N03E103.hgt; N04E100.hgt;
N04E101.hgt; N04E102.hgt; N04E103.hgt; N05E100.hgt; N05E101.hgt; N05E102.hgt;
N05E103.hgt; N06E099.hgt; N06E100.hgt; N06E101.hgt and N06E102.hgt.
2) NBorneo SRTM_V2.tif (compressed as NBorneo SRTM_V2.zip, 64.1 MB)
DEM of North Borneo. The height files (.HGT) used to construct the void-filled DEM are
N00E108.hgt; N00E109.hgt; N00E110.hgt; N00E111.hgt; N00E112.hgt; N00E113.hgt;
N00E114.hgt; N00E115.hgt; N00E116.hgt; N00E117.hgt; N00E118.hgt; N00E119.hgt;
N01E108.hgt; N01E109.hgt; N01E110.hgt; N01E111.hgt; N01E112.hgt; N01E113.hgt;
N01E114.hgt; N01E115.hgt; N01E116.hgt; N01E117.hgt; N01E118.hgt; N01E119.hgt;
N02E108.hgt; N02E109.hgt; N02E111.hgt; N02E112.hgt; N02E113.hgt; N02E114.hgt;
N02E115.hgt; N02E116.hgt; N02E117.hgt; N02E118.hgt; N03E108.hgt; N03E112.hgt;
N03E113.hgt; N03E114.hgt; N03E115.hgt; N03E116.hgt; N03E117.hgt; N04E108.hgt;
N04E113.hgt; N04E114.hgt; N04E115.hgt; N04E116.hgt; N04E117.hgt; N04E118.hgt;
N04E119.hgt; N05E114.hgt; N05E115.hgt; N05E116.hgt; N05E117.hgt; N05E118.hgt;
N05E119.hgt; N06E115.hgt; N06E116.hgt; N06E117.hgt; N06E118.hgt; N07E116.hgt;
N07E117.hgt and N07E118.hgt.
3) SBorneo SRTM_V2.tif (compressed as SBorneo SRTM_V2.zip, 32.1 MB)
DEM of South Borneo. The height files (.HGT) used to construct the void-filled DEM are
S01E109.hgt; S01E110.hgt; S01E111.hgt; S01E112.hgt; S01E113.hgt; S01E114.hgt;
S01E115.hgt; S01E116.hgt; S01E117.hgt; S02E109.hgt; S02E110.hgt; S02E111.hgt;
S02E112.hgt; S02E113.hgt; S02E114.hgt; S02E115.hgt; S02E116.hgt; S02E117.hgt;
S03E110.hgt; S03E111.hgt; S03E112.hgt; S03E113.hgt; S03E114.hgt; S03E115.hgt;
S03E116.hgt; S03E117.hgt; S04E110.hgt; S04E111.hgt; S04E112.hgt; S04E113.hgt;
S04E114.hgt; S04E115.hgt; S04E116.hgt; S04E117.hgt; S05E114.hgt; S05E115.hgt and
S05E116.hgt.
SHADED RELIEF MAPS OF PENINSULAR MALAYSIA AND NORTH BORNEO
The shaded relief models were made using the software GlobalMapper version 8 and exported as JPEG
files. The state and national boundaries were digitised from 1:500,000 scale map of Peninsular Malaysia
and 1:750,000 scale map of East Malaysia published by JUPEM. The outlines of major water bodies were
digitised from LANDSAT TM imageries. The layout of the shaded relief maps were prepared using
ArcGIS version 9 and converted into the following PDF files:
4) PMsia Relief Map.pdf (22.9 MB)
Shaded relief map of Peninsular Malaysia. Scale 1:500,000. Size 1140 mm x 1270 mm (42 in x 50
in)
5) NBorneo Relief Map.pdf (37.1 MB)
Shaded relief map of North Borneo. Scale 1:750,000. Size 1585 mm x 1044 mm (62.4 in x 41.1
in)
CITATION
If you use the above void-filled DEM data or shaded relief maps, the citation should be as follows:
1) Ng, T.F., 2007. Void-filled SRTM data of Peninsular Malaysia. Geological Society of Malaysia.
Available from http://geology.um.edu.my/gsmpublic/SRTM/
2) Ng, T.F., 2007. Void-filled SRTM data of North Borneo. Geological Society of Malaysia.
Available from http://geology.um.edu.my/gsmpublic/SRTM/
3) Ng, T.F., 2007. Void-filled SRTM data of South Borneo. Geological Society of Malaysia.
Available from http://geology.um.edu.my/gsmpublic/SRTM/
4) Ng, T.F., 2007. Shaded Relief Map of Peninsular Malaysia. Scale 1:500,000. Geological Society
of Malaysia. Available from http://geology.um.edu.my/gsmpublic/SRTM/
5) Ng, T.F., 2007. Shaded Relief Map of North Borneo. Scale 1:750,000. Geological Society of
Malaysia. Available from http://geology.um.edu.my/gsmpublic/SRTM/
BIBLIOGRAPHY
Aalto, R. and Montgomery, D.R., 2003. Characterizing mountain hillslopes and modelling erosion with
SRTM. Geohpysical Research Abstr., 5, 04735.
Bourgine, B. and Baghdadi, N., 2005. Assessment of C-band SRTM DEM in a dense equatorial forest
zone. C. R. Geoscience, 337, p. 1225-1234.
Farr, T.G. and Kobrick, M., 2000. Shuttle radar topography mission produces a wealth of data. Trans.
American Geophysical Union, 81, p. 583-585.
Ghoneim, E and El-Baz, F., 2007. The application of radar topographic data to mapping of a mega-
paleodrainage in the Eastern Sahara. J. Arid Environment, 69, p. 658-675.
Gorokhovich, Y and Voustianiouk, A., 2006. Accuracy assessment of the processed SRTM-based elevation
data by CGIAR using field data from USA and Thailand and its relation to the terrain
characteristics. Remote Sensing of Environment, 104, p. 409-415.
Grohmann, C.H., Riccomini, C. and Alves, F.M., 2007. SRTM-based morphotectonic analysis of the Pocos
de Caldas Alkaline Massif, southeastern Brazil. Computer & Geoscience, 33, p. 10-19.
Kellndorfer, J., Walker, W., Pierce, L., Dobson, C., Fites, J.A., Hunsaker, C., 2004. Vegetation height
estimation from shuttle radar topography mission and national elevation datasets. Remote Sensing
of Environment, 93, p. 339-358.
Miliaresis, G. Ch. And Paraschou, C. V.E., 2005. Vertical accuracy of the SRTM DTED level 1 of Crete.
International J. Applied Earth Observations & Geoinformation, 7, p. 49-59.
Rabus, B., Eineder, M., Roth, A. and Bamler, R., 2003. The shuttle radar topography mission – a new class
of digital elevation models acquired by spaceborne radar. J. Photogrammetry & Remote Sensing,
57, p. 241-262.
Valeriano, M.M., Kuplich, T.M., Storino, M., Amaral, B.D., Mendes Jr., J.N. and Lima, D.J., 2006.
Modeling small watershed in Brazilian Amazonia with shuttle radar topographic mission-90 m
data. Computer & Geoscience, 32 p. 1169-1181.
Verner, M., 2001. Shuttle radar topography mission (SRTM), mission overview. J. Telecommunication, 55,
p. 75-79.