HRES -- Synthetic high-resolution Antarctic bed elevation

HRES is a high-resolution (100m) synthetic bed elevation terrain for the whole Antarctic continent. The synthetic bed surface preserves topographic roughness characteristics of airborne and ground-based ice-penetrating radar data from the Bedmap1 compilation and the ICECAP consortium. Broad-scale features of the Antarctic landscape are incorporated from a lowpass filter of the Bedmap2 bed elevation data. The data are available in NetCDF classic format on a 100m resolution grid in a Polar Stereographic Projection (Central Meridian 0 degrees, Standard Parallel 71 degrees S) with respect to the WGS84 geoid. The 100m grid is 66661 rows by 66661 columns, where the corner of the lower left cell is located at a polar stereographic easting and northing of -3333000 m and -3333000 m, respectively. The value for missing data is -9999.A minor update was made to the dataset on 2021-12-23 to correct an error in the data.The issue was that while the x and y dimensions were defined in the netcdf file (i.e. how many points in each dimension) the corresponding variables defining the actual locations were not defined. Therefore, when the file was loaded, the software was defaulting to using the index count to be the coordinate location, which would look like 1m data spacingTo fix this, the coordinate variables have been defined, and also the order the data was written in to correspond to what viewing programs such as ferret expect has been swapped.The actual post-processing on the original data (hres.nc) wasgdal_translate -of netCDF -co WRITE_BOTTOMUP=NO NETCDF:"hres.nc":bed_elevation hres_temp_1.ncncpdq -a -y,x hres_temp_1.nc hres_temp_2.ncncap2 -S hres_nco.txt hres_temp_2.nc hres_revised.ncWhere the file hres_nco.txt contains the following 8 linesy=array(-3331000f,100,$y);x=array(-3331000f,100,$x);y@long_name="Northing";y@Standard_name="Northing";y@units="m";x@long_name="Easting";x@Standard_name="Easting";x@units="m";The second processing step (ncpdq) requires a system with a bit over 40GB of memory.