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- In the grids.xml config file create an empty regular grid definition.
- Open the netCDF file in your favorite viewer and find the details of the coordinate system in which the grid is a regular grid. This coordinate system is usually described in a grid mapping variable, which has an attribute called "grid_mapping_name". In your grid definition choose the geoDatum or grid projection that corresponds to this coordinate system.
- In the netCDF file find the variables that contain the coordinates of the grid cells in the coordinate system in which the grid is regular. These are one-dimensional variables that usually have standard names like "projection_x_coordinate" and "projection_y_coordinate" or "grid_longitude" and "grid_latitude". According to the CF conventions these coordinates are cell centers. Find the lowest x coordinate and use that as firstCellCenter x in your grid definition. Find the highest y coordinate and use that as firstCellCenter y in your grid definition.
- In the netCDF file look at the spacings between the x and y coordinates. If these spacings are constant, then use them as xCellSize and yCellSize in your grid definition.
- In the netCDF file find the sizes of the dimensions of the coordinate variables. Use these as the number of rows and columns in your grid definition.
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