Converting topographic data into binary geogrid format with write_geogrid.c

[natalia_c]

Hi,
I consider myself new at using WRF. I am currently trying to add new topographic data (because of resolution) from Gebco, by converting it to binary format with the recommended "write_geogrid.c" program. The thing is I am completely new with C, so I've been struggling when trying to use this program, specially regarding to the input data (gebco topography). I don't know which format would be the best to use, or how to properly call the data.
Now I'm working with a netcdf file called "gebco_topo.nc", where "topo" would be the altitud matrix.
How should I run this program? Editing it and writing the values of each argument, or do i specify the values when running it?

I couldn't find information about how to use the write_geogrid.c program, maybe because it is too simple or I don't know how to look for it.

 

[natalia_c]

This guide may be useful for someone I attached may be useful for someone. It doesn't use de C code given in WPS/geogrid/src. It shows how to convert the data to the geogrid format using GDAL.

 

[Arty]

This guide may be useful for someone I attached may be useful for someone. It doesn't use de C code given in WPS/geogrid/src. It shows how to convert the data to the geogrid format using GDAL.

Hello Natalia,

Did you succeed to make the geogrid program work properly with your new input binary file ? If so, could you please share your index file for comparison with the one I got from convert_geotiff.

Thanks for your help.

 

[natalia_c]

Hello Arty,
Yes, I succeeded. The following corresponds to my index file:

type = continuous
signed = no
projection = regular_ll
dx = 0.000277777777777778
dy = 0.000277777777777778
known_x = 1.0
known_y = 1.0
known_lat = -37.9712500
known_lon = -73.9790278
wordsize = 2
tile_x = 10656
tile_y = 10601
tile_z = 1
tile_bdr=0
units="meters MSL"
row_order = top_bottom
endian = little
description="ASTER Global Digital Elevation Model 1 arc second"

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I hope it can be of help!

 

[Arty]

Hello Arty,
Yes, I succeeded.
...
I hope it can be of help!

Thank you, indeed, it helped, giving me some hint concerning my own original data file and its projection. I should check on that.
Also I figured out I misnamed the binary file interverting the - and . separators.