Concept of COL and Contour diagram.

The concept of a Contour Line (COL) and a Contour Diagram is related to topography and geography. 1. **Contour Line (COL):** - A contour line is a line on a map that connects points of equal elevation. It represents the shape of the land surface. - Contour lines are typically drawn at regular intervals, such as every 10 meters or 100 feet, to show the elevation of the land. - Contour lines can be used to determine the steepness of slopes, the presence of ridges, valleys, and other topographical features. 2. **Contour Diagram:** - A contour diagram is a map that uses contour lines to represent the elevation of the land surface. - Contour diagrams are commonly used in topographic maps to show the shape and features of the terrain. - By examining the contour lines on a map, one can understand the elevation changes, slopes, and other topographical features of the area. Contour lines and contour diagrams are essential tools for understanding the topography of an area and for various applications in geography, engineering, and outdoor activities.