Height file Voordelta 2008
Description
Altitude model of the plates off the coast in the form of a grid with a resolution of 5 meters where the altitude value is included in meters. Parts of the sandy coast of the Netherlands are recorded in height every 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) is given an altitude value. This height value 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 explanation about the interpolation can be found in the manual the grids of the AHN on 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.
Resources
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https://geo.rijkswaterstaat.nl/services/ogc/gdr/hoogte_2008/ows?service=WCS&request=getcapabilities&version=2.0.1 |
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https://geo.rijkswaterstaat.nl/services/ogc/gdr/hoogte_2008/ows?service=WMS&request=getcapabilities&version=1.3.0 |