How Do We Construct a Topographic profile Objective

How Do We Construct a Topographic profile? Objective: To accurately construct a profile along any two points on a contour map.

X Rive r Ni le ocean DO NOW: Draw a side view along points XY of the surface feature shown in the map. . . C. I. = 10 m 0 1 2 3 4 km Y

ocean Riv er N ile X . . Y 0 1 2 3 4 km C. I. = 10 m Step 1: Number all contour lines above the line XY.

Riv er N i le ocean Step 2: Draw a horizontal grid that represent the distance XY. (done for you) 20 1030 40 X. 30 26. 5 m 0 50 40 30 20 10 0 X 1 2 3 20 10 . Y 4 km C. I. = 10 m Y

ocean er N ile Riv Step 3: Transfer the points where the contour lines cross the points XY from the contour map to a paper. 20 1030 40 X. 30 20 10 . Y 0 1 2 3 4 km Piece C. I. of=paper 10 m 50 40 30 20 10 0 X Y

er N ile Riv ocea Step 3: Transfer the points where the contour lines cross the points XY from the contour map to a paper. 20 1030 40 X. 10 203040 30 20 40 . Y 30 0 1 2 3 4 km 10 20 10 C. I. = 10 m 50 40 30 20 10 0 X Y

ocean Riv er N ile Step 4: Transfer the points from the paper 20 to the bottom of the grid. . 1030 40 X. 30 20 10 . Y 0 1 2 3 4 km C. I. = 10 m 50 40 30 20 10 0 X 10 40 Y

20 1030 40 X. ocean Riv er N ile Step 4: Transfer the points from the paper to the bottom of the grid. . 30 20 10 . Y 0 1 2 3 4 km C. I. = 10 m 50 40 30 20 10 0 X 10 20 40 30 20 10 Y

ocean Riv er N ile Step 5: Mark off the corresponding elevation for each points on the grid and connect the points with a smooth curved line. 20 1030 40 X. 30 That is what a map profile looks like. 20 10 . Y 0 1 2 3 4 km C. I. = 10 m 50 40 30 20 10 0 X 10 20 40 30 20 10 Y

Profiles are never shaded in but the next slide is shaded to give a more dramatic effect of the topography. This is what a topographic profile looks like. 50 40 30 20 10 0 X 10 20 40 30 20 10 Y

ocean er N ile Riv 20 1030 40 X. 30 20 10 . Y 0 1 2 3 4 km C. I. = 10 m 50 40 30 20 10 0 X 10 20 40 30 20 10 Y

DATE: _____ Riv ocean er N i le NAME: ___________ X. . Y 0 1 2 3 4 km C. I. = 10 m 0 X Y