Digital Map Updates with UAV Photogrammetric Methods

A photogrammetric approach for map updating using UAV in Rwanda

Geospatial data is an important asset for development planning in every country. Rwanda is experiencing a steady period of growth in terms of both population and economic development, which emphasizes the need for regularly updated maps so that development can be planned in effective way. The existing basemap produced from the 2008 orthophoto campaign which has been used to guide all country de...

Uav for Mapping —low Altitude Photogrammetric Survey

Two kinds of platform are accepted for mapping UAV system. One is remotely-piloted aircraft. Another is unmanned helium airship. A super-wide-angle camera is constructed by four digital cameras, mounted in different optical axis directions. A high accuracy calibration method is used to make compensation for the deformed errors due to the light and simple constructed mechanical frame. According ...

Digital terrestrial photogrammetric methods for tree stem analysis

A digital camera was used to measure diameters at various heights along the stem on 20 red oak trees. Diameter at breast height ranged from 16 to over 60 cm and height to a 10-cm top ranged from 12 to 20 m. The chi-square maximum anticipated error of geometric mean diameter estimates at the 95 percent confidence level were within ± 4 cm for all heights when obtained at a distance of 12 m or gr...

Sem/fib Stage Calibration with Photogrammetric Methods

Precise sample stage positioning plays an important role for various FIB (Focused Ion Beam) and SEM (scanning electron microscope) applications in microand nanotechnology. During the last few years, FIB instruments have become an indispensable tool for sample preparation, prototyping and micro-machining. Modern FIB devices are equipped with an additional electron column. Such combined SEM/FIB d...

UltraCam Photogrammetric Digital Aerial Cameras