There will be several dark lines on a map, illustrating roads, power lines etc, BUT you probably mean contour lines.
These are lines of equal altitude and are usually coloured brown for land, or blue for snow or ice fields.
Relief on a topographic map is shown using contour lines, which represent different elevations. The closer together the contour lines are, the steeper the terrain, while farther apart lines indicate flatter areas. Relief can also be depicted using shading or hill shading to show the three-dimensional nature of the landscape.
That would be a topographical map. It uses contour lines (usually 100 or 50 ft. incraments) to show elevation above or below sea level. They're usually black & white and can be found wherever you can find maps.
Contour lines or shading are typically used to depict craters and hollows on a map. These lines or shading indicate changes in elevation, helping to visually represent the topography of the land and show depressions or elevations on the map.
Because contour lines show the places with same height above sea level, and if they branched, we should instead use another set of contour lines to show a height difference for the place where they should branch, and another to show the same height for the altitude above sea level as the original supposed branch, as if they branched, it would mean that there was a difference in altitude between them.
The two measurements that show land elevation on a map are feet above sea level and meters above sea level. The map itself has contour lines in order to distinguish elevations.
The darker contour lines on map are called index contour lines. Numbers that indicate elevations are often written on these lines.
Index contour lines are thicker and usually have their elevation labeled. They help users quickly identify key elevations on a topographic map. In contrast, regular contour lines show the shape and elevation of the land but do not have specific labels.
A contour map. The lines are called contour lines
A topographic map would show elevations and contours.
Relief on a topographic map is shown using contour lines, which represent different elevations. The closer together the contour lines are, the steeper the terrain, while farther apart lines indicate flatter areas. Relief can also be depicted using shading or hill shading to show the three-dimensional nature of the landscape.
That would be a topographical map. It uses contour lines (usually 100 or 50 ft. incraments) to show elevation above or below sea level. They're usually black & white and can be found wherever you can find maps.
Contour lines show levels of elevation, where there are hills and valleys on a map
contour maps are maps that depict contour line. they contain lines of equal heights that are joined together and help to show elevations, terrain shape and many other features of the earth
One contour can not cross another because a contour is one exact elevation; if it crossed another contour it would show that it is higher than the second contour on one side, but lower on the other side.
Maps can show elevation with contour lines
To show an island with an elevation of 80 feet on a map with a contour interval of 10 feet, you would need to represent two contour lines: one at 80 feet and another at 90 feet. The space between the lines would then indicate the slope of the island's terrain.
The two measurements typically used to show elevation on a map key are contour lines and spot elevations. Contour lines are lines connecting points of equal elevation, while spot elevations provide specific elevation values at certain points on the map.