netcdf global_strain_values_surface {

// This is a sample of NetCDF CDL of a 2D earth-located lat lon grid of data at a given level.
// The IDV can display this data as contour lines, color-filled contours, pseudo-color
// images, data transects, and other ways. The IDV can make simple or conplex
// comnputations with data of this form, combining with other grids which need not have
// grid points at the same locations as this one.

// comments in CDL follow // comments are optional in NetCDF cdl files.

// for this 2D grid we have 3 coordinate grids, lat , lon, and one level or depth value.
// you can use any depth you like. 

// See NetCDF documentation for more about "UD Units" the units package used by the IDV.
// UD Units is Si compliant and the IDV can make computations with data in ud units, 
// making unit conversions where needed. 

// the IDV recognizes lat, lon, and level as special variable names for the grid locations.
// the variable name, sisr in this case, is provided by the data file creator.

// timeis not specified for this data although NetCDF can provide time in many ways as well,
// and time sequences with time as a 4th dimension.

// for more about NetCD and CDL see
// http://geon.unavco.org/unavco/IDV_for_GEON_netcdf.html and
// http://www.unidata.ucar.edu/software/netcdf/

dimensions:
        lat = 741 ;
        lon = 1800 ;
        level = 1 ;
variables:
        float sisr(lon, lat, level) ;
                sisr:long_name = "second invariant strain rate" ;
                sisr:precision = 5 ;
                sisr:units = "strain rate 10-9 per year" ;
                sisr:valid_range = 1, 3000 ;
        float lat(lat) ;
                lat:long_name = "Latitude" ;
                lat:units = "degrees_north" ;
        float lon(lon) ;
                lon:long_name = "Longitude" ;
                lon:units = "degrees_east" ;
        int level(level) ;
                level:long_name = "depth" ;
                level:units = "kilometers" ;
data:
                                                                                               
 sisr =  0,  0,   119.78, 256.41, ..., 472.69 ;

 lat = -68, -67.8, -67.6, -67.4, -67.2, -67, -66.8, -66.6, -66.4, -66.2, -66,
    -65.8, -65.6, ... ,  79.8, 80 ;
                                                                                               
 lon = -180, -179.8, -179.6, -179.4, -179.2, -179, -178.8, -178.6, -178.4,
    -178.2, -178, -177.8, -177.6, -177.4, -177.2, -177, -176.8, -176.6,
    -176.4, -176.2, -176, -175.8, ... ,  179.2, 179.4, 179.6, 179.8 ;
                                                                                               
 level = 0 ;
}