Measuring contour lines

Again, a new project is getting underway and thus preparations are necessary. This new project is to develop about 11 acres between the farm and the teacher’s college. For the time being, knowledge about the new area is needed. With 3 workers and equipment, we are well equipped for measuring. With the help of two wooden stakes, around each of which an approx. 10 m long rope is tied at the same height, and a spirit level, fixed exactly in the middle of the rope, the whole fun begins. One helper is responsible for each pole. Start in one corner of the area. Pole 1 and pole 2 are opposite each other, with a rope stretched as tight as possible between them. Now the third person is responsible for checking the spirit level. Then stake 2 (which is further away from the edge) is adjusted up and down the terrain until the spirit level no longer shows a slope. A peg is used as a
marker, which is hammered into the ground next to the stake. Then move stake 1 in a semicircle around the other and measure again until the spirit level shows the horizontal. This is to compensate for the fact that the rope might not have been tied to the stakes at exactly the same height. Slowly move across the width of the field and measure the direction of the contour lines. Then you go down thirty metres (depending on the slope) and measure again. When the work is done, the surveyed lines are entered into a surveying app via a mobile phone so
that you get a visual overview of the terrain. So you don't even need expensive equipment for a survey, as you might think. In fact, it is extremely simple.
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