Write a disscussion paper on Intermediate isoline map

This exercise is a little more challenging than the basic isoline map exercise, because the data points are irregularly distributed across the map, and because you must shape the isolines accurately. basic isoline exercise that you have completed, we didn’t emphasize isoline shape. However, isolines must be drawn as smooth curves, with few exceptions. In this intermediate exercise, you will draw topographic contour lines. Think about what each contour line represents in the real world: the points where a specific elevation extends across a slope. Consider what the land surface is shaped like as you move across it from side to side while maintaining the same elevation (that is, not moving uphill or downhill). If you follow a specific elevation line along a slope, you’ll find that the land surface generally curves smoothly, without abrupt, sharp corners. There are sometimes sharp corners—such as cliff edges or rock ridges—as you move uphill and downhill, but there are fewer equivalently sharp landforms as you move horizontally across the surface. As a result, contour lines generally have the shape of smoothly rounded curves. This pattern is especially evident on the ends of ridges, or on the slopes that extend between streams. In these cases, contour lines are usually U-shaped, with the rounded part of the U pointing downhill. Ushaped contours 1 Above: Three ridges extend from Avalanche Peak, in the middle of this map. Find the U-shaped ends of the ridges that extend from the peak at approximately the eleven o’clock, three o’clock, and seven o’clock positions. (These positions refer to an analog clock face–if you’re unfamiliar with this type of clock face, search for an image on the internet.) The broadly U-shaped curve of contour lines that represent slopes is most evident in the bottom center portion of the map excerpt. ‘Image The main exception to the pattern of smoothly shaped contour lines is locations where a contour line crosses a stream. As streams flow downhill, they erode the channel that they flow in. This process can produce a sharp, V-shaped angle that points uphill where a contour line crosses a stream. The V-shaped contours always point uphill. Image 2 Ushaped contours 2 Above: