There are lots of nice topography and bathymetry colour ramps provided by cpt-city in QGIS. However, I cannot find a straightforward way of specifying the transition from blue (below sea level) to greens/browns (above sea level) at (or in the region) of 0. Instead, I get something like this: I could manually edit the values but this seems cumbersome especially over a large range. Currently, the best option appears to be the one proposed here (split the data into 2, 1 above sea level, one below sea level): Bathymetric-topographic DEM color relief?
Is there a way to set a certain value, e.g. 0, and then force the recalculation of the others? At the moment if I change the blue/green value to 0, it just reorders the colours. Am I missing something obvious in how these colour ramps should be applied?