There can be various lines on a map, but the ones you are probably thinking of are 'latitude' and 'longitude'.
Parallel lines found on a map correspond to latitude.
longitude
On a map, longitude lines go up and down, AKA vertically. Latitude lines are horizontal lines on a map.
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
"contour lines"
The lines that intercept latitude lines are lines of longitude.
Isotherms and they are lines on a map that connect areas with the same surface temperature.
Contour lines: These lines connect points of equal elevation on a map and help depict the shape of the land surface. Latitude and longitude lines: These lines form a grid on a map to establish the precise location of a point on Earth's surface. Borders: These lines define the boundaries between different countries, states, or regions on a map.
The latitude lines printed on a map will depend on the scale of the map. A map of the Earth will probably have latitude lines printed every 15 or 30 degrees; a map of the United States will have latitude lines printed every 5 or 10 degrees.
a TOPOGRAPHICAL MAP shows the contour of the lines
Contour lines show levels of elevation, where there are hills and valleys on a map