| dc.description.abstract | Cadastral surveying is the intellectual and technical process by which the
boundaries of each of the land parcels within a given area are defined in a consistent
manner. The main problems of the Sri Lankan cadastral system are the increased
time consumption, high cost and inefficient methods for data acquisition. In
cadastral surveying mainly there are three operations, i.e. determination of
boundaries, survey of boundaries, and the demarcation of boundaries. This paper
presents a modern method of close-range photogrammetry using Unmanned Aerial
Vehicle (UAV) as a solution in the scope of determining and surveying boundaries.
This study analyses the capability of UAV surveys to function as a rapid, cost
effective and accurate alternative to current data acquisition techniques in the hope
of accelerating the cadastral mapping process of the country. The accuracy of UAV
to survey outer boundaries was measured by comparing land extents of typical land
parcels obtained via two methods, UAV and Total Station (TS). The results of this
study show the point cloud generated from UAV images generate a similar extent
output as conventional methods. The only limiting factor was boundary visibility
which was not an issue in the research scope. The advantage of UAV systems lies in
their high flexibility and efficiency in capturing the surface of an area from a low
flight altitude. | en_US |
