Height file Wadden 2008

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Provided by Ministerie van Binnenlandse Zaken en Koninkrijksrelaties

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Dataset information

Country of origin
Updated
Created
Available languages
Dutch
Keywords
Quality scoring
175

Dataset description

This stock includes the areas: Eems and Dollard, Amelander sea hole. Height model of plates in the form of a grid with a resolution of 5 metres where the height value is recorded in meters. Parts of the plates are recorded in height each year. A digital height model (DHM) is a file in which the height is displayed according to a regular, rectangular grid. Each cell of the grid (also called a grid cell) gets a height value. This height is calculated from the surrounding laser points of the filtered base file. The technique used for this purpose is a so-called weighted average interpolation. More information and explanations about the interpolation can be found in the manual on the grids of the AHN at www.ahn.nl. If there are no laser points near a grid cell, the cell remains empty (the cell gets a nodata value). Important to know is that the value of a 5x5 meter grid cell is calculated from multiple laser points (the number depends on the point density of the base file). As a result, the influence of the measurement noise and outliers decreases and a slight degree of flattening occurs.
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