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Length of dimensions
i number of rows
j number of columns
D = (i+1) * (j+1)
Z = i * j
U = (i+1)j
V = i(j+1)
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These are examples of netcdf implementations. Please comment if you think they can be improved |
Netcdf example for collocated grids
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dimensions: zimax = 1116 //number of cells in x direction: 1116 zjmax = 7028 //number of cells in y direction: 7028 uimax = 1117 //number of u edges in x direction (i+1) ujmax = 7028 // number of u edges in y direction (j) vimax = 1116 //number of v edges in x direction (i) vjmax = 7029 // number of v edges in y direction (j+1) dimax = 1117 // number of d vertices in x direction (i+1) djmax = 7029 // number of d vertices in y direction (j+1) D = 7851393 //(i+1) * (j+1) Z = 7843248 // i * j U = 7850276 // (i+1)j V = 7844364 // i(j+1) variables: //Z-grid //coordinates of centres double zx(zimax, zjmax); zx:standard_name = "longitude"; zx:units = "degrees_east"; double zy(zimax, zjmax); zy:standard_name = "latitude"; zy:units = "degrees_north"; //U-grid //coordinates of u edges double ux(uimax, ujmax); ux:standard_name = "longitude"; ux:units = "degrees_east"; double uy(uimax, ujmax); uy:standard_name = "latitude"; uy:units = "degrees_north"; //V-grid //coordinates of v edges double vx(vimax, vjmax); vx:standard_name = "longitude"; vx:units = "degrees_east"; double vy(vimax, vjmax); vy:standard_name = "latitude"; vy:units = "degrees_north"; //D-grid //coordinates of d vertices double dx(dimax, djmax); dx:standard_name = "longitude"; dx:units = "degrees_east"; double dy(dimax, djmax); dy:standard_name = "latitude"; dy:units = "degrees_north"; //Constituents are defined at the Z grid double c(zimax, zjmax); c:long_name = "rhodamynerhodamine"; c:units= "1e-3" //bedlevel double dp(dimax, djmax); dp:standard_name = "bedrock_altitude"; db:unit="metre"; db:positive="up"; //bathymetry double dp2(dimax, djmax); dp2:standard_name = "bedrock_altitude"; db2:unit="metre"; db2:positive="down"; |