Bathymetry - Forum - Delft3D Flexible Mesh

Hey everyone,

Hope all are doing great, I am now working with Delft3D FM... and I don't know where can I create the depth file (like the one in Delft3D that you create using Quickin)...
Sorry for my basic questions:

1) how can I create my depth file for FM... (do I use RGFGRID?)
I attach an image... I created the grid myself, I also made the .xyz file using AutoCAD and other tools...
I want to simulate sediment transport in this "lagoon", by just using tides...

2) I would also like to know... if m grid is ok, because I would like to take into account a little bit over the landboundary (over 0)...
I would like to see flooding in a future example, and I want to create a better grid.

3) So, I don't quite get it now, but, how does Delft FM takes the points that are negative and those which are positive...

thanks in advance
greetings