Hi Heiko:
latest 4.1 release (4.1.20100430.2256) has a fix for this. thanks for
reporting.
John
On 4/30/2010 8:24 AM, Heiko Klein wrote:
Hi,
netcdf-java seems to ignore the grid_mapping attribute if several
grid_mapping_name variables are present:
I'm currently reprojecting some data from
int projection_1 ;
projection_1:grid_mapping_name = "polar_stereographic" ;
...
to
int projection_stere ;
projection_stere:grid_mapping_name = "polar_stereographic" ;
...
The reprojected altitude has now the attributes:
short altitude(time, y, x) ;
altitude:standard_name = "altitude" ;
altitude:units = "m" ;
altitude:coordinates = "lon lat" ;
altitude:grid_mapping = "projection_stere" ;
For reference, I still keep the original 'projection_1' variable in the
file. But whenever I try to view the altitude (idv (webstart),
netcdf-toolsUI (4.1)), the data is distorted because netcdf-java assumes
'projection_1' to be the correct projection for 'altitude'.
I can solve the problem by completely deleting the projection_1
variable, but since I use the 'altude:grid_mapping =
"projection_stere"', this shouldn't be neccessary.
An example-file with altitude around Greenland is attached.
Best regards,
Heiko
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