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Dumpy Level Surveying

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?.

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Dumpy Level Surveying

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  1. Dumpy Level Surveying Energy & Environment

  2. 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

  3. 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

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

  5. 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? Building on a slope Water Transportation How could we mark this information on a map? Contours

  6. Now it is time for a discussion.

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