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GEBCO database

Instructions to import bathymetry data from GEBCO.

TLDR;

Select a region on the website, download a ESRII ascii file (.asc), and convert to bellhop .bty.

Example

We will download a region and convert the data for use un UnrealInterface.

  1. Select a region

alt text

  1. Download the ESRI ASCII and a Colour Map, following the instructions on GEBCO.

  2. In the python tool, point the infil and outfil variables to your files. For example, to parse the included file:

infil = open("gebco_2022_n33.7802_s32.3273_w-119.5189_e-116.992.asc", 'r')

outfil = open("san_diego.bty", 'w')

..* Tip - The script projects on the Earth with geopy.

  1. At this point, the .bty file may be used in Bellhop as usual. To load it into Unreal, you can set the filename in the setting. alt text

..* The environment file still has to exist. ..* Don't forget to escape the backslash in Windows.

  1. In the same section in Unreal, you can set the bottom material to be the image you downloaded from GEBCO.