How Do We Construct a Topographic profile? Objective: To accurately construct a profile along any two points on a contour map.
km ocean C.I. = 10m X Y. River Nile DO NOW: Draw a side view along points XY of the surface feature shown in the map.
km ocean River Nile C.I. = 10m X Y.. Step 1: Number all contour lines above the line XY.
km ocean River Nile C.I. = 10m 26.5m X Y Step 2: Draw a horizontal grid that represent the distance XY. (done for you) YX
km ocean River Nile C.I. = 10m X Y YX Step 3: Transfer the points where the contour lines cross the points XY from the contour map to a paper. Piece of paper
km ocean River Nile C.I. = 10m X Y YX Step 3: Transfer the points where the contour lines cross the points XY from the contour map to a paper.
km ocean River Nile C.I. = 10m X Y YX Step 4: Transfer the points from the paper to the bottom of the grid
km ocean River Nile C.I. = 10m X Y YX Step 4: Transfer the points from the paper to the bottom of the grid..
km ocean River Nile C.I. = 10m X Y YX Step 5: Mark off the corresponding elevation for each points on the grid and connect the points with a smooth curved line. That is what a map profile looks like.
YX This is what a topographic profile looks like. Profiles are never shaded in but the next slide is shaded to give a more dramatic effect of the topography.
km ocean River Nile C.I. = 10m X Y YX
km ocean River Nile C.I. = 10m X Y.. Y X 0 NAME: ______________________DATE: _________