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'''Footprint''' is the area of space that a [[tower]] occupies when placed in a [[map]] in the {{series|Bloons TD}}. A tower can only be placed if its footprint does not overlap any other towers' footprints or [[terrain (map mechanic)|terrain]] the tower cannot be placed on. A footprint is usually either a circle (defined by a radius) or a rectangle (represented by height and width). Easier maps tend to have more open spaces for placing larger or higher amounts of towers, while harder maps often limit the amount of space that towers can be placed on (sometimes preventing certain towers from being usable at all).
'''Footprint''' is the area of space that a [[tower]] occupies when placed in a [[map]] in the {{series|Bloons TD}}. A tower can only be placed if its footprint does not overlap any other towers' footprints or [[terrain (map mechanic)|terrain]] the tower cannot be placed on. A footprint is usually either a circle (defined by a radius) or a rectangle (represented by height and width). Easier maps tend to have more open spaces for placing larger or higher amounts of towers, while harder maps often limit the amount of space that towers can be placed on (sometimes preventing certain towers from being usable at all).


When placing a new tower, the player must make sure to have enough open space to place it beforehand, as a new tower cannot override area that is already occupied. Players can remove the towers that use the desired space, usually by selling them.  
When placing a new tower, the player must make sure to have enough open space to place it beforehand, as a new tower cannot override area that is already occupied. Players can remove the towers that use the desired space, usually by [[sell]]ing them.  


== ''Bloons Tower Defense'' / ''Bloons Tower Defense 2'' / ''Bloons Tower Defense 3'' ==
== ''Bloons Tower Defense'' / ''Bloons Tower Defense 2'' / ''Bloons Tower Defense 3'' ==