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Energy & Environment. What are these lines called and what are they used for? If this map has a scale of 1:25,000 what does this mean? They are called.

Published byBertram Carroll Modified over 9 years ago

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Presentation on theme: "Energy & Environment. What are these lines called and what are they used for? If this map has a scale of 1:25,000 what does this mean? They are called."— Presentation transcript:

1 Energy & Environment

2 What are these lines called and what are they used for? If this map has a scale of 1:25,000 what does this mean? They are called contours. They join up similar spot heights For every 1cm on the map, it represents 25,000cm in real life or 250m

3 An Alidade. It is used for looking through and drawing a line parallel to your line of sight What is this called and what is it used for? A Tripod. It is used for getting a level surface on rough ground A Plane table. It is used for drawing on. What is this called and what is it used for?

4 Leveling Staff Tripod Dumpy Level Theodelite GPS Compass Measuring Tape alidade Tripod Plane Table

5 How could we mark this information on a map? Why might we want this information? Water Transportation Building on a slope To find the elevation of a point with respect to a known level. What do we use it for? Contours

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