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.

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Presentation transcript:

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 contours. They join up similar spot heights For every 1cm on the map, it represents 25,000cm in real life or 250m

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?

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

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