I’m not sure what you refer to here.
I don’t think bathymetry varies too much year to year. I’m not sure what year is represented by the sample data, but the more recent the better I suppose.
I believe this data was created in 2014, and it should represent conditions from many years prior to that. For example, please see WAVEWATCH III® 30-year Hindcast Phase 2
The landmass should be a polygon layer that depicts the coastline you are interested in. There are many public datasources, for example https://www.naturalearthdata.com/
Please see the User’s Guide for details on how to create the AOI: http://releases.naturalcapitalproject.org/invest-userguide/latest/coastal_vulnerability.html#data-needs
Also look at the sample data included when you install invest to see how the AOI looks relative to the landmass.
I’m not sure what you’re referring to exactly. The model itself will create shore points at regular intervals along the coastline.
These are just a unique ID for each shore point. They don’t have any meaning in terms of the results. But they can be used to relate the data in one output table to that in another output table.
There is no “correct” number for any of these parameters. Please see this other thread for more information. Coastal Vulnerability parameters: model resolution, max fetch distance, elevation radius
Most important: I encourage you to try running the model with whatever data you have, as soon as you can. Do not worry about getting the parameters or the data perfect first. You can always update them and re-run the model.