In the middle of the box, I can see there is a spot with no contour lines. Well, if I start at ‘720 Duffy Hill’ and follow the black dashed line to the right, I can see the circles going down in a nice and similar fashion. Given that the distance between each contour line is 10 meters, what do the contour lines in the green box below depict? Other Important Uses Of Contour LinesĪs already reviewed, contour lines depict the elevation of the ground on a map. So, in practical terms I can apply this to my whole hiking route in advance and I can work out a good route for however long I want to be out hiking for. I can now estimate that it will take me 19.5 minutes to walk from point A to point B. I add that to about 6.5 minutes, for my 625 meters for walking the distance from point A to point B at 5 km per hour. Using the example above, with 13 contour lines, I allow 1 minute per contour line giving 13 minutes. Part of this rule states that you allow one minute for every 10 meters of elevation. Next up we need to account for the height element.Ī generally accepted rule, although it is open to adaptation based on various factors like group size, speed, etc, is Naismith’s Rule. If I use 5 kilometers per hour as a walking speed, I know it will take me 12 minutes to walk across 1 box, 1 km, on the flat. So now that I can measure distances and height, using route planning methods I can also start to make an estimation of how long it will take me to travel that distance. Therefore, I can now tell that to get from point A to Point B I need to travel 755 meters in total. So now I know from point A to point B there is an elevation of 130 meters and a flat distance of 625 meters. So, if 4 cm’s represents 1 km, that means the distance on the ground is about 625 meters. So, if I also measure the distance on the map across from point A to Point B, I get approximately 2.5 cm’s. So, one square, 4 cm’s in length on the map, depicts 1 kilometer (4*25,000cm’s) on the ground. As we know the distance between each contour line is 10 meters, we know that from point A to Point B there is an elevation of 130 meters, 13 * 10 meters.Īs well as that, this map uses a 1:25k scale. In the example below, we can see there are 13 contour lines from the bottom right corner, lets call it point A, of the square highlighted in green to the ‘720’ peak of the mountain, let’s call it point B. Distance being the length of space across one square in the example below and height being the amount of contour lines in the same space. I can use my map to measure distance and height to a particular point. What do I mean by this? Well, say I’m sitting the night before planning my hiking route for the following day. So what can you use them for when hiking? Well, in short, they help you plan your hiking route safely and to take alternative action on a route should you need to. So, now we have an idea of what contour lines on a map are. The contour lines depict the height of said mountain in the two dimensional space. So if you imagine the top of the mountain being squished downwards from the top into the ground, that’s what you have above. Remember, a topographic map depicts a three dimensional space in a two dimensional format. You can also see the wavy circular type lines get smaller and smaller as they reach the top of the mountain where it says ‘Camaderry 702’. So, if we look at the picture above, you can see a contour line highlighted by the green arrow. Best Hydration Bladders For Hiking In 2021.
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