The profile of the area represents a vertical section of a land relief on the plotted trajectory. The simplest profiles are under construction on a direct trajectory and represent the vertical projection of a surface kind of knifed along this line. Actually the profile can be cost along the line having any form.
Instruction
1. The profile can be constructed with the different purpose and have a different appearance. If you need constructionroutesto raze, for example, at the mountain, then to determine total structural volumes and amount of soil which should be taken out it is enough to construct several rectilinear profiles which are radially dispersing from top of this mountain. If you are a cyclist – you will be needs a profile of the route which is laid on the mountain to calculate the forces, knowing what duration and the steepness there will be rises and descents on a route of competitions.
2. You will be able to construct a profile along any line, having the local map. Even if this card – only a flat piece of paper, for those who are able to read it it – an invaluable source of information on a surface and a relief of that territory which on it is represented. Actually, information displayed on the flat, two-dimensional card allows to build three-dimensional model of the area, and, so and to determine height of any point on it.
3. Heights on the card are displayed by means of the horizontals which are carried out through the equal number of meters, a certain section of a relief. Its value is surely specified in a card legend. The elevation mark of any point can be determined by two horizontals between which it gets, their height is already known. Depending on that at what distance this point is from each of them, also its height is defined.
4. Plot a projection of the route of a profile to the plane in the form of the direct pieces connected with each other by nodal rotary points. Measure each piece of the route from a point to a point and apply them on paper in the form of one continuous horizontal line which length is equal to the sum of all pieces of the route. The provision of each point of turn has to be noted on this line by a stroke.
5. Perpendicularly to the first point construct a piece – a scale of heights on which you will postpone heights of rotary points of the route. Determine height of each nodal point by the card and postpone this height on a vertical scale on the perpendiculars restored from turn points on a horizontal line of the route.
6. Connect the postponed points of heights along all route, and you receive an area profile along the line of the route.