Hello Ferreters,
I have visited this site
<http://www.ngdc.noaa.gov/mgg/global/global.html>recently and I got
grd files with Etopo1 Global Relief Model.
When I do ncdump on this grd file I get
netcdf ETOPO1_Ice_g_gmt4 {
dimensions:
x = 21601 ;
y = 10801 ;
variables:
double x(x) ;
x:long_name = "Longitude" ;
x:actual_range = -180., 180. ;
x:units = "degrees" ;
double y(y) ;
y:long_name = "Latitude" ;
y:actual_range = -90., 90. ;
y:units = "degrees" ;
int z(y, x) ;
z:long_name = "z" ;
z:_FillValue = -2147483648 ;
z:actual_range = -10898., 8271. ;
// global attributes:
:Conventions = "COARDS/CF-1.0" ;
:title = "ETOPO1_Ice_g_gmt4.grd" ;
:history = "grdreformat ETOPO1_Ice_g_gdal.grd
ETOPO1_Ice_g_gmt4.grd=ni" ;
:GMT_version = "4.4.0" ;
:node_offset = 0 ;
data:
(...)
but when I try to use this file in ferret, it doesn't know anything
about axes: x, y. It confuses me.
Then I get this error message:
**ERROR: dimensions improperly specified: must be a 2D region
shade z
But I thought that z is defined on 2D region as ncdump said.
So, the question is how I can use this grd file in ferret?
Kind regards,
Szymon Roziewski