"Problems with geo-data"
This paper, which complements that given on “Data base research and development at UKSC”, will consider the implications of handling geographic data in that context. It surveys the practical and semantic problems of handling geographic data and summarises the requirements that must be satisfied by a coherent support system. The philosophy is presented of a geographic data type, taking an allowed range of values, and associated with an appropriate set of primitive operators. The implications of network geographic data are also considered. The interface between the system and the problem programmer is discussed, and implementation problems are explored with reference to conventional geographic processing technology, noting the inherent advantages and difficulties. An alternative strategy is outlined which offers the possibility of overcoming some of the present problems and acheiving significant advantages in terms of simplicity and performance. The paper concludes with a discussion on the potential for geo-data in processing as compared with that required solely for graphic output, and hence considers the true role of such data in pictorial applications.
KeywordsGeographic Data Character String Hardware Device Spatial Description Geographic Object
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- Aldred,1974a: The Case for a Locational Data Type. IBM UK Scientific Centre Report No. UK0054. Neville Road, Peterlee, Co. Durham, England. 1974.Google Scholar
- Aldred,1974b and Smedley: The Urban Management System. IBM UK Scientific Centre Reports No. UK0050, UK0052, UK0053. Neville Road, Peterlee, Co. Durham, England. 1974.Google Scholar
- Aldred,1974c: Locational Value Encoding Technique. IBM UK Patent Application No. 55910/74, December 1974.Google Scholar
- DOE,1972: UK DEPARTMENT OF THE ENVIRONMENT. GISP — General Information System for Planning, HMSO. 1972.Google Scholar
- DOE,1973: UK DEPARTMENT OF THE ENVIRONMENT. Manual on Point Referencing Properties and Parcels of Land. HMSO. 1973.Google Scholar
- Fisher,1968 et al: Reference Manual for Synagraphic Computer Mapping (SYMAP), Version V. Laboratory for Computer Graphics and Spatial Analysis, Graduate School of Design, Harvard University Cambridge, Mass. USA, 1968.Google Scholar
- Gardiner-Hill: Digitising and Editing Techniques. International Cartographic Association Commission, III Paris, France, 1971.Google Scholar
- NATO,1974: Proceedings of the Advanced Study Institute on Display and Analysis of Spatial Data. Nottingham, England. 1974.Google Scholar
- PTRC,1971: Urban Data Management Symposia sponsored by PTRC / DATUM / CIUT / CIDC / AFCET / NORDPLAN. Bonn 1971, London 1972, Paris 1973, Madrid 1974.Google Scholar
- Rhind,1974a: State of the Art in Geographic Data Processing. IBM UK Scientific Centre seminar on Geographic Data Processing, Peterlee, Co. Durham, England. November 1974.Google Scholar
- Rhind, 1974b: An Introduction to the Digitising and Editing of Mapped Data. Automated Cartography edited by DALE P.F. British Cartographic Society. 1974.Google Scholar
- SCRIS,1970: US BUREAU OF CENSUS. The ACG/DIME Updating System and Interim Report. SCRIS report No. 4. 1970. Washington DC 20233.Google Scholar
- SFIT: Swiss State Data Bank. Swiss Federal Institute of Technology. Zurich, Switzerland.Google Scholar
- Tomlinson,1967: An Introduction to the Geographic Information System of the Canadian Land Inventory. Canadian Department of Forestry and Rural Development, Ottawa. 1967.Google Scholar
- Trewman,1974: Automated Cartography and Urban Data Banks in the UK. 7th. International Conference on Cartography ICA, Madrid. 1974.Google Scholar
- UNESCO,1972: Symposia on Geographical Information Systems sponsored by the UNESCO and IGU 1972, 1974.Google Scholar
- URISA,1966: Annual Conference Proceedings of the Urban and Regional Information Systems Association, Stockton State College, New Jersey, USA. 1966–1974.Google Scholar
- Weald,1974: The Price and Problems of Information Systems to support Urban and Transportation Planning — with special reference to Data Quality. CIDC / AFCET / PTRC / NORDPLAN Symposium on Urban Data Management. Madrid 1974.Google Scholar