transportation engineering Flashcards
Survey Instruments Used in Transportation Engineering
Total Stations
Auto Level/Dumpy Level
Theodolite
Global Positioning System (GPS)
Photogrammetry/Drone
Optical Square
Plumb Bob Laser
Laser Distance Meter (LDM)
Prismatic Compass
Prism
Leveling Staff
Prism Pole
Measuring Wheel
Tripod
an electronic/optical instrument used modern surveying and building construction that uses electronic transit theodolite in conjunction with electronic distance meter (EDM)
Total Stations
it is also integrated with microprocessor , electronic data collector, and storage system
Total Stations
used to measure sloping distance of object to the instrument , horizontal angles and vertical angles
Total Stations
enables for computation of data collected to further calculate the horizontal distance, coordinates a point and reduced level of point
Microprocessor unit
optical instrument to establish or verify points in the same horizontal plane
Auto Level/Dumpy Level
it is used in surveying and building with a vertical staff to measure height differences and to transfer, measure, and set heights
Auto Level/Dumpy Level
basic surveying instrument of unknown origin back to the 16th century english mathematician Leonard Digges
Theodolite
used to measure vertical and horizontal angles
Theodolite
space-based satellite navigation system the provides location and time information in all weather conditions, anywhere on or near the earth where there is an unobstructed line of sight to four or more GPS satellites
GPS
art and science of making accurate measurements by means of aerial photography
Photogrammetry/Drone
uses a pentaprism to reflect and retract a beam or sighting 90 degrees, it is used in pairs in surveying and in a singular block in metrology
Optical Square
type of laser level that projects a
small dot onto a surface. These dots are used for transferring points from
wall to wall or ceiling to floor. It’s a handy tool for making sure a wall is plumb
or even installing wall-to-wall.
Plumb Bob Laser/Dot-Plumb Laser
based on the
principle of reflection of a laser beam.
Laser measurement tools
this device
emits a pulse of laser in the direction of an object, for example a
wall. The time necessary for the laser beam to get to the object
and go back determines the measurement of the distance.
LDM