e Coastlines 
e Highways 
e Major Roads 
e Main City Streets 
e Minor Roads 
e Railway Tracks 
e Lakes 
e Main Rivers 
e National Borders 
A complementary file was also created containing the 
following elements: 
e Main City Names 
e Town Names 
4. CONCLUSIONS 
The demand for mobile radio communications is expected 
to be more strongly realised in the near future and will 
continue to depend on the accurate prediction of signal 
strength and coverage for one or more sites. It has been 
proven that digital data generation, analysis and 
administration can serve this demand efficiently. 
As systems and techniques constantly improve, the 
telecommunication industry is beginning to benefit from 
data generation which traditionally has been performed 
by external methodologies. As costs continues to drop the 
only limitation on the quality and visual impact of the data 
is the user's imagination. 
5. REFERENCES 
ERDAS IMAGINE, 1996. Erdas Field Guide, Atlanta, 
USA, pp 236, 264,554. 
ISTAR/GEOMET, 1994. PANAFON TERRAIN 
DATABASE, Technical Proposal, Athens, GREECE. 
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International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B4. Vienna 1996