4 dumpy level surveying introduction

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4 dumpy level surveying introduction

  1. 1. Dumpy Level SurveyingEnergy & EnvironmentThis PowerPoint Presentation is developed and created by :
  2. 2. Revision from PreviousLesson 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. 3. Revision from Previous Lesson What is this called and what is it used for? What is this called andAn Alidade. It is what is it used for?used for looking A Plane table. It is usedthrough and for drawing on.drawing a lineparallel to your lineof sight What is this called and what is it used for? A Tripod. It is used for getting a level surface on rough ground
  4. 4. Surveying Tools Theodelite Measuring GPS Compass Tape alidade DumpyPlane Table Leveling Level Staff Tripod Tripod
  5. 5. Dumpy LevelWhat 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
  6. 6.  Now it is time for a discussion.

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