[OSGeo Africa] (DEM information from)

[Aslam Parker]

Dear Fhumulani 
 
DEM for the whole South Africa is available from National Geo-spatial Information (NGI) at a resolution far greater than the global DEM.   The NGI has full National DEM coverage sourced from hybrid methods, i.e. from photogrammetric or vectorised contour datasets. The data is supplied in either ASCII text or ERSI grid formats at 25m x 25m spacing or multiples thereof.
 
See below for all relevant contact details.
 
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Chief Directorate: National Geo-spatial Information, Private Bag X10, Mowbray, 7705. South Africa
Van der Sterr Building, Rhodes Avenue, Mowbray. Cape Town.
Email: sales at ruraldevelopment.gov.za.  Website: http://www.ngi.gov.za  
Tel : +27 (0)21-658 4300. Fax: +27 (0)21-686 9884 or 086 620 2175
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>>> Fhumulani Munzhelele <mfhumu at gmail.com> 2012/02/20 02:53 PM >>>
Hi, can anyone help: i have DEM Layer worldwide in MrSID format,compressed to Wavelet (MG2)
Pixel Depth =8Bit
I need to use it in a small area like munic area, the problem is whe i used it for munic area and zoom to munic its resolution becomes very bad(big pixels). how to set the layer based on the resolution
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