What are topo maps?
The term topo map is short for the lengthier topographic map. Topo maps, also known as contour maps, are maps that show the Earth’s surface in a series of contour lines. Contour lines give reference to the elevation of any given point, and the lines are drawn in a series of intervals that show mountain heights, ocean depths, and the steepness of slopes. Topo maps usually give a reference surface to any given map, and the contour lines are drawn from that point. For instance, in Hawaii, the reference surface would be sea level, while in Colorado, it might be a low river valley or the lowest point in the state, depending on the size of the map. Contour lines on topo maps always have a line of equal elevation, meaning that if a topo map is drawn for a particular hill or mountain, any given elevation will have a contour line to match that height, and the line will never cross itself. Elevations are usually printed on topo maps just along the edge of the contour line, or sometimes superimpo
Topographic maps show the type of terrain in an area and are a valuable aid to property planning. They are commonly referred to as contour maps. A topographic map represents a three-dimensional landscape on a flat surface. Contour lines represent points on the map that are the same height above or below a known reference point (normally taken to be sea level). Topographic maps can help to locate catchment boundaries and drainage lines. They are useful for planning the locations of fences, access tracks, watering points, buildings and yards. Land slopes can be measured from a topographic map and provide useful data for the design of erosion control measures, dams, pipelines and irrigation schemes.
