Called both Elevation Lines or Contour Lines
Elevation contour lines.
Maps can show elevation with contour lines
A topographic map shows equal lines of elevation, in set distances which can vary between maps (dependent on the grade of elevation change). elevation,relief,and slope.
To determine the elevation of point A on the topographic map, look for the contour lines closest to that point. The elevation of point A will typically be indicated by the nearest contour line, with the value increasing or decreasing based on the direction of the contour lines. If point A is between two contour lines, estimate its elevation based on its relative position to those lines. Without the specific map, I can't provide an exact elevation, but this method will guide you in finding it.
Contour line connect points of equal elevation on a map, whereas relief is the difference in elevation from the highest and lowest on a map.
Topographical lines
I think it's an index contour, but I'm not sure.
A contour line on a topographic map is typically labeled with the elevation in round units. This helps to indicate the elevation of the land and the change in elevation across the map.
Contour lines are typically labeled with their elevation, indicating the vertical distance above a reference point, such as sea level. This allows users to easily determine the elevation profile of the land or terrain represented on a map.
"contour lines"
To determine elevation on a topographic map, look for contour lines that connect points of equal elevation. The elevation can be found by reading the numbers on these lines. The closer the lines are together, the steeper the terrain.
Elevation contour lines.
Contour lines show elevation on a topographical map. These lines connect points of equal elevation above sea level, with lines close together representing steep terrain and lines further apart indicating gentler slopes.
Mountains on a map are usually depicted with contour lines or shaded relief to show their elevation and topography. The lines are drawn closer together to represent steep slopes and farther apart for gentler terrain. Peaks are indicated by closed contour lines with the elevation labeled.
Contour lines or also known as isohypses, connect points of equal elevation on a map. Contour lines can be curved, straight or a mixture of both. The lines on a map describe the intersection of a real or hypothetical surface with one or more horizontal planes.
A topographic map shows the elevation of the Earth's surface using contour lines to represent changes in elevation. The closer together the contour lines, the steeper the terrain; the farther apart, the gentler.
Brown lines