Geografic Coordinates

In this politic map of Spain you can see  the meridians and parallels that correspond of this follow cities:
*BARCELONA = BLACK.
*MADRID = GREEN.
*SEVILLA = RED.
*LA CORUÑA = BLUE.
*PALMA DE MALLORCA = YELLOW.
How you know, parallels are the horizontal lines, and meridians are the vertical lines.
by Daniel