Drawing Cross-Sections & Calculating vertical Exaggeration

April 19, 2023

105010010

50

100

A B

piece of paper

105010010

50

100

A B

piece of paper

0

120 x

x

x

x

x

x

x

x

x

x

x

x

x

x

•Line up your piece of paper with a graph grid with 2 vertical axes.•The x-axis should be the same length as your outermost marks on you piece of paper•Draw the cross-section by writing the marks on the grid at the heights from the map.•Draw the line freehand that joins up the dots.

Draw these cross sections from the Perisher Valley 1:25000 Topographic Map

• From:– Survey point 258677

• To– The lake at 277629

• From– River source 136646

• To– Survey Point 157698

Calculating Vertical Exaggeration

• See page 24 of your Atlas Workbook for a good explanation of this.

Vertical Exaggeration (VE) = Vertical Scale (VS) ÷ Horizontal Scale (HS)

Remember that your units of measurement must be the same

1cm:100m on a map must be changed to 1cm:10,000cm for the calculation.