Mikkonen P, Niskanen J
Digital orthophotography and terrain modeling
Abstract: There is a growing interest in utilizing raster format data in civil engineering
applications. An essential question is how to use photographs as digital reference
data in geographical information system (GIS) or equivalent applications. This is
possible using orthophotographical solutions. Software development has made it
possible to use computerized methods in orthorectification process. This paper
presents basic concepts of digital orthophotography, which include the properties
of a conventional (aerial) photograph, rasterizing and orthorectification. Digital
orthorectification utilizes digital terrain modelling techniques, which are discussed
briefly. Some practical applications are also discussed.
The result of this study presents a business oriented approach to the computerization
of models for information handling in facility management. The models are designed
to be expedient to future applications which is expected to be the next step.
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Permission to reproduce these papers has been graciously provided by VTT, Espoo, Finland.