Meteo/Grid Coordinate System

RE: Meteo/Grid Coordinate System

2022-06-03T15:35:11Z

Gabriel, thank you for your answer

I'm checking all my grd file now and found that format specifications are not uniform: some of them have 0 as missing value, others have -999.999, and some files do not even declare a missing value (according to the RGFGRID manual, if not specified, it is assumed 0). Note that I'm currently using FM Suite 2022.03.

RE: Meteo/Grid Coordinate System

2022-06-03T00:46:47Z

Hi Diego,

I wanted to do a simple water wave propagation using the WAVE module a few years ago. The program gave me an error message; I do not remember precisely the message, but I followed the @ye recommendation. This recommendation matches your answer.

I check my grid file and correct "Missing Value" whenever I use WAVE. I think the recommendation for all those who use the WAVE module is to always check the grid file before doing any simulation.

I hope the Deltares development team can fix this problem in the next RGFGRID versions.

Regards.

Gabriel

RE: Meteo/Grid Coordinate System

2022-06-01T17:43:54Z

Hi,
I managed to solve the issue:
RGFGRID saved the grd file with

1	-9.99999000000000024E+02

as missing value. Although it is specified as

1	Missing Value = -9.99999000000000024E+02

, WAVE was still reading -999.999 as actual grid coordinates. I replaced all the occurrences of

1	-9.99999000000000024E+02

with

1	0.00000000000000000E+00

and now it runs fine. It seems -999.999 is an invalid missing value when using spherical coordinates.

Meteo/Grid Coordinate System

2022-06-01T16:38:18Z

Hi,

I defined a grid that covers latitude between -24.4 and -23.74 and longitude between -46.8 and -45.6. I also defined a wnd file that cover latitude between -24.5 and -23.5 and longitude between -47.7 and -45.5. However, when I run WAVE, I got the following error:

1
2	ERROR:
3	Error in meteo module: Flow point outside meteo grid (x-dir) x,y,: -3812.0
4	-3902.0
5	Wave exited abnormally

I understand that all flow points must be inside the meteo/wnd grid, so I defined the extents accordingly. However, even if I made an error, WAVE reports coordinates -3812.0 and -3902.0, which are not valid latitudes or longitudes.

I wonder if WAVE is compatible with geographical coordinates since it interprets them incorrectly.

Please find attached my grid and wnd files if it helps.

Thank you