Ways of improving the accuracy of digital aerial photography by the railway transport inventory
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1
Uniwersytet Przyrodniczy w Lublinie
Katedra Inżynierii Kształtowania Środowiska i Geodezji, Poland
2
Lviv Polytechnical National University
Department of Cadastre Terrestriale
Publication date: 2014-06-30
Geomatics, Landmanagement and Landscape 2014;(2)
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ABSTRACT
The development of railway sector around the world has always been a vital issue, as it plays
important social, financial and economical role and influences the development of the country
a lot. Because of constant growth and modernizing of the railway sector all processes and items
of land and property fund have to be monitored. On the basis of the world experience, trends in
the development of methods and technologies of area mapping it has been established that for
the inventory of land and property fund objects cartographic material at 1 : 500 or 1 : 1000 scales
suits the most. With the large amounts of work (for example area of mapping and number of
railroad objects) it is reasonable to use digital aerial photography and technology of digital data
processing, in particular methods of digital photogrammetry. In order to increase the accuracy
of creating the cartographic component, the authors suggest, when choosing the parameters
of aerial photography, taking into account spatial resolution of camera system, its geometrical
properties, the influence of external factors and first of all the atmospheric refraction. It has been
proved that by highly precise aerial photography the accuracy of fixation of angular elements
of camera orientation with the help of Inertial Navigation Systems (INS) may be insufficient.
Therefore it is recommended to thicken core network using block phototriangulation. This paper
presents the description and results of experimental work, which helped to create cartographic
material from digital images at 1 : 3000 scale with an accuracy of 4–5 cm, which fully meets the
requirements for holding inventory, monitoring, maintenance, design and construction.