Topographic maps use contour lines to show elevation and surface shape. Index contours are labeled with increasing numbers, with lighter lines in between representing smaller increments. Contour intervals allow for numerical elevation determination. Contour lines can be measured in different units. They also show surface definition, such as the shape of an island or mountain. […]
A contour map is a representation of a three-dimensional feature using contour lines on a flat surface. It shows hills, valleys, and slopes and includes a title, scale, contour range, and legend. Contour lines connect points of equal value and have a constant contour interval. Index contours help interpret the map, and different features can […]
