Dave Sandwell is distributing his near-global FAA and VGG grids in geographic netcdf format. From those files, I can derive down-sampled and tiled versions as we do for other grids. These files gets custom grid-scale and offsets so that we can pack as high data resolution as is reasonable in a 16-bit integer netCDF grid. This PR adds two recipes and enhances some of the script for down-sampling:
Add _earthoceanfaa.recipe with a precision of 0.025 mGal (0.025 = 1/40)
Add _earthoceanvgg.recipe with a precision of 0.03125 Eotvos (0.03125 = 1/32)
Let s_rv_downsamplergrid.sh check if latitude range is less than 180 and then extend to poles with NaNs
While all this works fine and greatly compresses the data set via our JPEG2000 tiles and compressed netcdf grids, I am checking with Dave if he is able to fill in land/ocaen values the last 10 degrees to either pole as we would prefer to have a truly global grid.
I will also need to check with him regarding default CPTs he prefers for the data (since auto-scaling from master is not helpful when the data extremes of around 1000 is used to stretch a CPT). However, I wanted to commit this while I remember the various tricks and can document them.
Dave Sandwell is distributing his near-global FAA and VGG grids in geographic netcdf format. From those files, I can derive down-sampled and tiled versions as we do for other grids. These files gets custom grid-scale and offsets so that we can pack as high data resolution as is reasonable in a 16-bit integer netCDF grid. This PR adds two recipes and enhances some of the script for down-sampling:
While all this works fine and greatly compresses the data set via our JPEG2000 tiles and compressed netcdf grids, I am checking with Dave if he is able to fill in land/ocaen values the last 10 degrees to either pole as we would prefer to have a truly global grid. I will also need to check with him regarding default CPTs he prefers for the data (since auto-scaling from master is not helpful when the data extremes of around 1000 is used to stretch a CPT). However, I wanted to commit this while I remember the various tricks and can document them.