Import of Delft Grid

EFDC_Explorer
1

Hello!
I am trying to import a grid I built in Delft3D version 4.00.01. I built the grid using 9 domains and I used spherical coordinates.
When trying to import the grid into EFDC Explorer 5.0 and 6.0 I receive the following error message, “Bad Delft RFGGrid file format”. I used this grid to run a 3D model in Delft so I know it works. I am wondering if this is an incompatibility problem. Is Delft version 4.00.01 not compatible with EFDC Explorer 5.0 and 6.0?

Any help is appreciated to help solve this problem.

Thanks!

Michael

2

Hi Michael,

I think EFDC Explorer should work with the grid created with DElft3D. As long as the format is *.grd the grid generation should work via EFDC Explorer. Can you post you grid file here or somewhere so that I could have a look if there is a problem with grid format or any other problem ?

Thanks.

John

3

Hello John!
Thanks for your reply.
I have attached one of the domains that make up the complete grid. I you need to see all my grid domains, let me know.

Thanks for the help.

Michael

4

John, You can access the grid file through the link below. {REMOVED} Michael

5

Hi Michael,

I looked at your grid and as you said it is in spherical coordinate system. I was able to open the grid in my delft program. However, when I tried to use the grid created using the spherical coordinate system then it says bad formatted RGFgrid file. It seemed to work when I used the Cartesian coordinate system. So, it seems you need to provide your grid data in Cartesian coordinate format to use in EFDC explorer. I am not 100% sure though. I would encourage you to recreate your grid using Cartesian coordinate system. I don’t think it is a compatibility issue of Delft version and EFDC explorer.

Good luck.

John

6

Hello John,
Thanks for checking my grid. I will go ahead and convert my domains in Delft from Spherical to Cartersian coordinates so they can be imported into EFDC. Is it possible to convert from Cartesian to Curvilinear coordinates in EFDC Explorer?

Thanks,
Michael

7

Hi Michael,

If you go to Delft RGFGRID there are two coordinate systems ; one is spherical and one is cartesian. So under cartesian you can create any shape of grid you like. It doesn’t need to be rectangular you can create curvilinear by the use of splines and grid tool. Then you can create the grid in EFDC Explorer using the output from the Delft RGFgrid.

John

8

John,
Thanks for all your help. I’m able to create my grid in EFDC now.

Thanks,
Michael

9

Michael,

You are welcome. Good luck.

John