Dumpy Level Surveying Energy & Environment.

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Presentation transcript:

Dumpy Level Surveying Energy & Environment

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

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

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

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

Now it is time for a discussion.