quiz 1 intro Flashcards
what does ACSM stand for
American Congress of Surveying & Mapping
what does ACSM do (3)?
- accurately determine terrestrial points and their relation to each other
- find change in grade, drainage
- determine property lines
what does IB stand for ? what does it do?
- iron bar; marks property line
accuracy vs precision
accuracy: quality –> how close to reality measurement is (drawing)
precision: quantity –> numbers or exactness
what does BM stand for? what is it?
- bench mark; starting point or known point, usually bronze disk on permanent structure/ location
what does TBM stand for?
temporary benchmark; used for short amounts of time during construction ex. fire hydrants
what is a datum? give 3 examples
starting point of scale
ex. sea level ASL or BSL
prime meridian-longitude
equator- latitude
what does GIS stand for?
Geographic information system
when did surveying begin?
5000 years ago
who first started surveying? what evidence is there to prove this?
- Egyptians, pyramids of Giza
- perfectly square
- orientation around the stars
what system did the egyptians use to execute the pyramids?
- 3,4,5 triangle
- “ knotted cord” –> rope stretchers
what was the second system for surveying? who invented it?
- Surveyor’s Chains, Romans
name 5 pieces of equipment we would be using to survey?
- tripod
- transit/ level
- level rod
- tape measure
- total station ( EDM)
what does EDM stand for
Electronic Distance Measurement
name 3 devices that use laser level to survey?
- GPS
- Sextent
- theodolite
