Marsdiep Inner Tidal Basin maps inner Marsdiep-side channels and tidal flats at an angler-useful scale, using the clipped official Rijkswaterstaat waterbody and gridded bathymetry rather than a modeled basin.
Recorded max
115 ft
Species
Atlantic Herring, European Flounder, European Seabass, Common Sole
Marsdiep Outer Tidal Basin maps outer Marsdiep-side channels and tidal flats at an angler-useful scale, using the clipped official Rijkswaterstaat waterbody and gridded bathymetry rather than a modeled basin.
Recorded max
40 ft
Species
Atlantic Herring, European Flounder, European Seabass, Common Sole
Vlie Inner Tidal Basin maps inner Vlie-side channels and tidal flats at an angler-useful scale, using the clipped official Rijkswaterstaat waterbody and gridded bathymetry rather than a modeled basin.
Recorded max
60 ft
Species
Atlantic Herring, European Flounder, European Seabass, Common Sole
Vlie Outer Tidal Basin maps outer Vlie-side channels and tidal flats at an angler-useful scale, using the clipped official Rijkswaterstaat waterbody and gridded bathymetry rather than a modeled basin.
Recorded max
113 ft
Species
Atlantic Herring, European Flounder, European Seabass, Common Sole
How to compare Western Wadden Tidal Basins sections
The released set contains 4 survey-backed sections and 0 modeled sections. Their published maximum depths run from 40 to 115 ft, with a median of 113 ft. Those numbers make scale differences visible, but they do not make sections interchangeable: contour provenance, access, species evidence and local structure remain specific to each child map.
Start with the section closest to the water you actually plan to fish. Then compare its depth-data label and species roster with an adjacent section before treating a pattern as system-wide. A survey-backed child is the stronger choice for precise breakline planning; a modeled child is broader reconnaissance and should be checked against sonar and conditions on the water. Return to this overview whenever you cross into another mapped reach, pool or coastal section.
Same child-page contract
What every section keeps separate
Depth provenance: each child discloses whether its contours are survey-backed or modeled; a family card never upgrades that label.
Fishing spots: structure and seasonal recommendations are calculated inside the child boundary so distant reaches are not mixed together.
Fish species: each page keeps its own supported roster rather than inheriting every species found anywhere in the parent system.
Local context: hatch guidance, access, hazards, catches and nearby-water links continue to resolve for the individual child where data is available.
Planning questions
Frequently asked questions
Why is Western Wadden Tidal Basins divided into separate fishing maps?
The legacy western Wadden map exceeded 32 miles; Marsdiep and Vlie are separate tidal-basin planning pages.
Are these depth maps survey-backed?
4 released maps use surveyed or official agency bathymetry. Each child keeps its own provider, product, datum and not-for-navigation disclosure.
Do fish and access records apply everywhere?
No. Species, forage, access and fishing spots remain scoped to each child map and retain their evidence labels.