Coordinate Grids, I believe.
Coplanar lines that do not intersect are called parallel lines.
This is called a map projection.
"Parallels" of latitude. Those are the lines that are drawn horizontal on the globe or map.
This is a "grid."
grid
A topographic map.
The horizontal lines are called latitudes and the vertical lines are called longitudes.
The are called Contour Lines.
Lines of Longitude or Meridians
The lines are parallel on the map are called Latitudes.
They are called the magnetic field lines.
They are called the magnetic field lines.
They are called the magnetic field lines.
Called both Elevation Lines or Contour Lines
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.
Isobars
They are called 'borders'.