The below given example I have picked from CF 1.6 convention
document.Does this mean that we have to provide x and y coordinate
values in 'x' and 'y' variables and also provide the latitude and
longitude values corresponding to the grid as 2-D variables in 'lat'
and 'lon'. Does that not mean duplication of data as we can always
find out lat,lon values from the x, y values by using the given
projection parameters. Is there any possibility of getting one sample
product in Lambert Conformal Conic/Mercator projection. I will be
really grateful to you.
dimensions:
y = 228;
x = 306;
time = 41;
variables:
int Lambert_Conformal;
Lambert_Conformal:grid_mapping_name = "lambert_conformal_conic";
Lambert_Conformal:standard_parallel = 25.0;
Lambert_Conformal:longitude_of_central_meridian = 265.0;
Lambert_Conformal:latitude_of_projection_origin = 25.0;
double y(y);
y:units = "km";
y:long_name = "y coordinate of projection";
y:standard_name = "projection_y_coordinate";
double x(x);
x:units = "km";
x:long_name = "x coordinate of projection";
x:standard_name = "projection_x_coordinate";
double lat(y, x);
lat:units = "degrees_north";
lat:long_name = "latitude coordinate";
lat:standard_name = "latitude";
double lon(y, x);
lon:units = "degrees_east";
lon:long_name = "longitude coordinate";
lon:standard_name = "longitude";
int time(time);
time:long_name = "forecast time";
time:units = "hours since 2004-06-23T22:00:00Z";
float Temperature(time, y, x);
Temperature:units = "K";
Temperature:long_name = "Temperature _at_ surface";
Temperature:missing_value = 9999.0;
Temperature:coordinates = "lat lon";
Temperature:grid_mapping = "Lambert_Conformal";
regards
Ghansham
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