Contour mapping
The above signs are the conventional signs used in map-making. Contouring is most easily explained by cutting an apple in half and placing the halves face downwards, to represent a hill. You can then slice the pieces horizontally at regular distances to illustrate heights, as shown on a map.
Judging Heights and Distances
Every Scout must be able to judge distance from an inch up to a mile and more. You ought, first of all, to know exactly what is the span of your hand and the breadth of your thumb, and the length from your elbow to your wrist, and the length from one hand to the other with your arms stretched out to either side, and also the length of your feet and of your stride; if you remember these accurately, they are a great help to you in measuring things.
Judging the distance of objects from you is only gained by practice, and judging the distance of a journey is generally estimated by seeing how long you have been travelling, and at what rate; that is to say, supposing you walk at the rate of four miles an hour, if you have been walking for an hour and a half you know that you have done about six miles.
A Scout must be able to estimate heights.
