They are called 'borders'.
Meridians - or lines of longitude.
State boundary lines State delimitation lines. State demarcation lines. shiter
Bahahaha. They are called contour lines! That's the scientific name.
Those lines are called "borders".
Parallel lines found on a map correspond to latitude.
Those lines are called lines of latitude. They are also known as parallels as they run parallel to the equator.
There can be various lines on a map, but the ones you are probably thinking of are 'latitude' and 'longitude'.
longitude
On a map, longitude lines go up and down, AKA vertically. Latitude lines are horizontal lines on a map.
A map that shows the height of a mountain is called a topographic map or a relief map. These types of maps use contour lines to represent the elevation changes of the land and provide a visual representation of the mountain's height and terrain.
The lines that are perpendicular to the latitude lines on a map are called longitudinal lines. There are 24 of them, each representing 15 degrees of change.
Topographical lines