UNITED NATIONS
    • Knowledge Service Section
    • About
    • Blog
    • Help
  • My Account
  • Knowledge Service Section
  • About
  • Blog
  • Help
Knowledge Repository
English | Français

45009 publications

Advanced Search
View Item 
  •   ECA IR Home
  • Work programmes
  • Innovation and Technology
  • Geo Spatial Information Systems
  • View Item
  •   ECA IR Home
  • Work programmes
  • Innovation and Technology
  • Geo Spatial Information Systems
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Topographic mapping from satellite imagery in Africa

Thumbnail
View
Bib-56522.pdf
Download
Bib-56522.pdf (2.137Mb)
Published
1996-10
Author(s)/Corporate Author (s)
Petrie, G.;
United Nations. Economic Commission for Africa;
Share
 Facebook
 Twitter
 Linkedin
Metadata
Show full item record
Abstract
The paper first reviews the situation regarding topographic mapping in Africa. While for some countries, the main concern is the production of new base maps, for many other African countries the main problem is the revision of a large number of existing maps which are now thoroughly out-of-date. The situation prevailing in most African national mapping agencies is then outlined and the availability of satellite photography and scanner imagery over Africa is then discussed. The results of tests of the accuracy and the content of topographic maps derived from satellite imagery conducted over a number of test sites having different landscape characteristics are summarized and discussed. Next some examples of topographic mapping from stereo-SPOT imagery are described, including those from Ethiopia, Djibouti aid Guinea. This is followed by further examples of purely planimetric line mapping from Nigeria and image mapping from Central Sudan, using monoscopic SPOT and TM images respectively. This leads on to a further discussion of a UNDP-supported national map revision programme carried out over Uganda. The paper then goes on to make a comparison of the respective attributes of small-scale aerial photography and satellite imagery for topographic mapping in Africa and concludes with a short discussion of the likely impact of the availability of higher resolution satellite imagery which is promised for the near future.
Citation
“Petrie, G.; United Nations. Economic Commission for Africa (1996-10). Topographic mapping from satellite imagery in Africa. UN.ECA Regional cartographic conference for Africa (9th : 1996, Nov. 11 - 15: Addis Ababa, Ethiopia). Addis Ababa :. © UN. ECA,. https://hdl.handle.net/10855/14884”
Conference
UN.ECA Regional cartographic conference for Africa (9th : 1996, Nov. 11 - 15: Addis Ababa, Ethiopia)
URI
https://hdl.handle.net/10855/14884
Collections
  • Geo Spatial Information Systems [1426]
 
Browse
All of ECA IRCommunities & CollectionsTitleAuthorSubjectBy Issue DateECA Conference ProceedingsFlagship PublicationHas File(s)SpeechesPress ReleasesResolutionsBest PracticesThis CollectionTitleAuthorSubjectBy Issue DateECA Conference ProceedingsFlagship PublicationHas File(s)SpeechesPress ReleasesResolutionsBest Practices
My Account
My AccountRegister
Reporting Suite
Most Popular ItemsStatistics by CountryMost Popular Authors
A service provided by the Economic Commission for Africa - Contact Us - Send Feedback
Follow us: