Relation: DEM90_USGS

 

Theme: Digital Elevation Model of Thailand

 

Source:

 

The Digital Elevation Model (DEM) was generated from the Shuttle Radar Topography Mission (SRTM) available at the United States Geological Survey (USGS) website (http://srtm.usgs.gov/).

 

For more information, please visit: http://spatialnews.geocomm.com/features/shuttle/srtmdataupdate03/index.html

 

Date of the data: 2000

 

Quality of data: good but with some local artefacts

 

Data exhaustiveness: There are some voids corresponding to the water stretches (as the DEM is derived from a radar image)

 

Datum and ellipsoid of the mosaic: Indian 1954, Everest

 

Projection of the mosaic: UTM; Central Meridian 99, Zone 47

 

Description of the processes performed on the image:

 

The DEM is composed from a set of tiles which were mosaicked in the Savamer module. The original format of the DEM is hgt.

 

Original Resolution: The original DEM is 90 metres spatial resolution.

 

Resolution of the mosaic: 100 metres per pixel

 

Person in charge of the rectification and integration: Marc Souris, IRD

 

Person in charge of the metadata: Florent Demoraes, IRD

 

Integration Date: 2004

 

Description of the attribute

 

Altitude = numerical attribute = elevation in metre above sea level