Aerial Survey N22 Road

Skeye performed an aerial survey for the Province of South Holland in the Netherlands of the secondary road N228. The aim of the project was to generate a very high resolution and accurate orthophoto mosaic.

As it is forbidden in the Netherlands to fly a drone above a N road (secondary road), Skeye chose to use a manned aircraft equipped with the PhotoEye system. This in house developed system allows the pilot to fly along pre-defined lines, take photographs at predefined positions and log the orientation and position of the images. Data processing is done as if these were images taken with a drone.

The advantage of using the PhotoEye system versus the more traditional methodology of aerial photography is mainly in the costs and the extremely high-resolution photography that can be obtained. Especially for smaller projects the PhotoEye system is a good alternative because data acquisition and processing can be done in a very short time frame.

Ground control points were measured every 200 meters along the road with the use of a RTK GPS. In addition over 100 verification points were measured so as to be able to perform a good quality control after data processing.

The final product was an orthophoto mosaic with a ground resolution of 2 cm.