What are the 3 ways to which height can be shown on a map cordinate survey map zone?

Height can be represented on a coordinate survey map using contour lines, which indicate elevation changes by connecting points of equal height. Another method is the use of spot elevations, where specific points on the map are marked with their exact height above a reference level. Lastly, digital elevation models (DEMs) can provide a 3D representation of terrain, displaying height variations through color gradients or shading techniques.