The -20m Line represents a simplified version of the 20-meter depth contour line relative to NAP (Normaal Amsterdams Peil). This contour line marks areas where the depth is consistently 20 meters below NAP, providing important information for understanding underwater topography.
In the designated reservation areas for sand extraction, which are located west of the 20-meter depth contour line (doorgaande-20m_nap), sand mining activities are permitted. These areas have been specifically identified to manage and regulate sand extraction, ensuring that it is conducted in controlled locations to minimize environmental impact and optimize resource use.
In the MSP Challenge, this layer is not editable but it represents the border set by the government for sand extraction activities.
None
Rijkswaterstaat
doorgaande-20m_nap
The “doorgaande-20m_nap” layer represents a simplified version of the physical NAP (Normaal Amsterdams Peil) -20 meter depth contour line. This contour line indicates areas where the depth is consistently 20 meters below NAP. The physical NAP -20 meter depth line can be quite irregular due to the influence of sand transport caused by currents and waves.
Not applicable.
This layer is not available in the Baltic Sea Edition.
This layer is not available in the Clyde Marine Region Edition.
This layer is not available in the Adriatic Sea Edition.
This layer is not present in the Eastern Mediterranean Sea.
Co-funded by the European Union.