Dear all,
Is there anyone who experienced problem in merging global and local bathymetry dataset?
When extracted depth of GEBCO or ETOPO dataset reach to measured depth, I meet a difference of 2000 m in deep water and at least 100 m in shallow waters. Such differences make surge model results wrong.
How should I face with this issue?
(Measured depth are available in a distance of 10 km from shoreline. For the rest parts, global dataset is utilized. Moreover, the area cannot be considered smaller, since it should cover the cyclone track).
Thanks in advance for your help,
Global data sets are likely to have coarser resolution and therefore one would expect some differences. If I understand your question correctly, however, you are seeing differences from your measured values of 2000 vertical meters in shallow water and at least 100 m in shallow water. These are enormous differences and suggest a methodological issue. The first step I would take is make sure that all files are appropriately spatially referenced.
Also, more detail regarding your methods, program, and modeling could allow for a more precise answer.
Best of luck.
You will issues at the boundary and their you could apply smoothing technique through GIS tool. It would be difficult in correct in one go, but it would take some time and Experts help.
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