Hi everyone and welcome to this video today I'm going to explain to you how to calculate a gradient now before you do something like that it's always very important to know what you are doing because that would make it easier to remember now the gradient is basically how steep a slope is between two different places now that is the simplest way of explaining it so the formula is gradient equals vertical interval over horizontal equivalent now what does this tell you it tells you the vertical interval is the difference in height between those two locations on the map so it's a simple calculation 200 minus 140 or something like that and the horizontal equivalent is simply the distance between those two places so you are going to calculate if you have 25 centimeters on your map then you are going to calculate the real distance between those two places so let's have a look at our map so here we have a few contour lines now it's important to understand what they represent a contour line is a line that connects every place with the same altitude so in other words on this line here for example each and every place on the line doesn't matter where we go it could be here it could be there or yet every single place on this line is 1020 meters above sea level right so your teacher might ask you to calculate the gradient between point a and point B now first thing you need to know is what is the height point a so this there are no numbers on this side of the map but if you just trace this line if you go all along this line you'll see that it's 1020 because every place...

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