- #1

brandy

- 161

- 0

if you are given a contour map how could you calculate the volume of the hill.

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- Thread starter brandy
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- #1

brandy

- 161

- 0

if you are given a contour map how could you calculate the volume of the hill.

- #2

mgb_phys

Science Advisor

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There is an interesting law for the area of any polygon if you are given the contours as line segments.

- #3

brandy

- 161

- 0

they'r ellipses but id still like to hear it

- #4

mgb_phys

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Area = (x0y1 + x1y2 + ... + xn-1y0 - y0x1 - y1x2 - ... - yn-1x0) / 2

It doesn't matter what shape it is (doesn't have to be convex) as long as the sides don't

cross each other.

- #5

brandy

- 161

- 0

what exactly do u mean by x0 and x1 and y0 and etc

- #6

mgb_phys

Science Advisor

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The nice thing is that you don't have to calculate any lengths or angles.

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