Integration of Orthophototechnique into a 
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Ulrike Stampa-Wessel Harald Engel 
Institut für Photogrammetrie und Ingenieurvermessungen 
Universität Hannover 
1. Introduction 
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For tasks of urban and regional planning, the provision of 
actual working material in form of maps is required. In many 
cases photogrammetric data collection and processing methods 
are applied for their making. 
Linemaps are standard applications, produced by the use of 
stereomodels. Another possibility is given by the differential 
rectifcation of aerial photographs to orthophotomaps. Those 
maps combine the advantage of the high information density of 
aerial photographs with the advantage of an orthogonal pro- 
jection of a map. Superimposition of othophotos and graphical 
data, which are important for the planning procedures, result 
in task-specific planning maps. : 
By well-aimed selections, land related data - already existing 
in a land information system - can be applied for the making of 
those orthophotomaps. 
2. Tasks and Content of a Land Information System 
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A land information system exists of land related data and 
methods for their collection, management, processing and pre- 
sentation. Those digital data are related to different majors 
like land regestry, topography, planning and utility documen- 
tation. 
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