Revealing Celtic Fields from Lidar Data Using Kriging Based Filtering

<p>A detailed elevation model of the Netherlands has been acquired with the use of Airborne Laser Altimetry and is managed by AHN (Actueel Hoogtebestand Nederland). This elevation model can be used for a large amount of applications. Using a suited illumination technique it turned out to be possible to find and visualize so-called Celtic fields, agricultural fields systems of about 2500 years old in the AHN data. Here we will show that the visualization of Celtic fields out of AHN data can be enhanced by applying a geostatistical filter technique that removes the raw topography from the data set such that only the micro-topography, including the Celtic fields, remains. Visualization of this micro-topography not only enhances the images of the already known Celtic fields but also shows that the spatial extend of the field system is larger than expected.</p>