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DATA ACQUISITION FOR LAND INFORMATION SYSTEMS
BY PHOTOGRAMMETRY
by Gottfried Konecny
University of Hannover, Fed.Rep. Germany
Commission Il, WG 11/1
Invited Paper
15th International Congress for Photogrammetry and
Remote Sensing. Rio de Janeiro, Brazil, June 1984
1. Introduction
The topic of "Land Information Systems" has internationally provoked a large interest du-
ring the past 5 years. Within the International Federation of Surveyors (F.!.G.) a special
commission has been set up for this area of interest. In 1978 a special F.1.G. symposium
on Land Information Systems has been organized in Darmstadt in the Fed.Rep.Germany.
Land Information has also been the topic of some Technical Cooperation Workshops held
in the Federal Republic of Germany in cooperation with the United Nations (Hannover
1978, Berlin-West 1983) [11], [2]. At such meetings it usually becomes evident, that the
term "land information system" is utilized by different groups in a different context:
2. Types of Land Information Systems
1) The group of geographers and regional planners consider as land information system a
collection of geographic (land use) or planning data (land development potential). The
information is either based on areas with geometrically defined boundaries or on grid
points or other spatially distributed points between which the information may be
interpolated.
2) The group of classically oriented surveyors from developing countries see as land infor-
mation system the task of establishing a cadastre on the basis of monumented ground
control, on photogrammetrically compiled line maps or (ortho-)photomaps in which
land parcels have been graphically delineated, and a land register or a land title
system with obligatory registration of land transfers.
A good example for such a system is the Atlantic Provinces Surveying and Mapping Pro-
gram established in Eastern Canada since the 1960's [3], [4]. In developing countries
there is frequently a social or political motivation to establish a system of this nature
[2].
3) For the group of surveyors from developed countries, who have already an established
cadastral system in operation. a land information system is an automated form of the
multipurpose cadastre which is made accessible for users of other disciplines.
4) From rural reallotment and land consolidation comes the wish to create a land infor-
mation system on the basis of the cadastre, which not only contains cadastral infor-
mation, but opens the system for the systematic recording and the updating of all
data relevant for planning purposes.
5) In urban and highly developed regions there is the wish to include into a land informa-
tion system not only area related data, such as the cadastre, but also data referenced
to points and lines, such as topography and the utilities. Such data are to be collected
and kept up to date in a global information system containing all data of an urban area
in integrated form.
