sentences:  World Meteorological Organization squares
  
  World Meteorological Organization squares or WMO squares is a system of geocodes that divides a chart of the world with latitude-longitude gridlines (e.g.plate carrée projection, Mercator or other) into grid cells of 10° latitude by 10° longitude, each with a unique, 4-digit numeric identifier (refer chart at NODC World Ocean Database 2005 page).