I'm experiencing problems with the import of bathymetry data in QGIS, which I downloaded freely from GEBCO or NOAA. The problem is that if I import the grid (either with .nc or .asc extension, or if I extract it as geotiff), I simply get a grey map with very faint or no differentiation in depth.
Does anybody know what the problem is? Are there are other free sources to get bathymetry data from?
Thanks!
ellen