Dimensions
----------
n_grid_points = Data_Block->Grid_Point_Counter

Variables
---------
export-name     | dimension_names   | original_name         | data_type

grid_point_id   | n_grid_points     | Grid_Point_ID         | unsignedInteger-32
lat             | n_grid_points     | Grid_Point_Latitude   | float-32
lon             | n_grid_points     | Grid_Point_Longitude  | float-32
altitude        | n_grid_points     | Grid_Point_Altitude   | float-32