The false statement about the use of longitude and latitude lines on maps is that They are used to show the depth of the oceans.
Explanation
Longitude and latitude lines- these are imaginary lines that circle the globe in the east-west and north south directions. They can be used to show direction instead of a compass.
and to identify the equator and prime meridian. On the maps they can also be used to locate things. They helps in labeling every place on the earth surface. Equator being the most useful line which runs horizontally around the fattest earth part. These lines are useful because they define the east-west position of the location of the planet earth.
