240 likes | 271 Views
A History of Surveying. Most images have been provided by Ken Allred, ALS, CLS and Patrick Ringwood, BCLS, CLS. A History of Surveying. From Eratosthenes to GPS. Eratosthenes 276 B.C. 3800 BC The oldest known topographic map on a clay tablet of a northern part of Mesopotamia.
E N D
A History of Surveying Most images have been provided by Ken Allred, ALS, CLS and Patrick Ringwood, BCLS, CLS
A History of Surveying From Eratosthenes to GPS Eratosthenes 276 B.C.
3800 BC The oldest known topographic map on a clay tablet of a northern part of Mesopotamia
I lifted up mine eyes again, and looked, and behold a man with a measuring line in his hand. Zechariah 2:1
Early Egyptian Civilization • The Pyramids • Flooding of the Nile Pythagoras • Early cadastral records to 3400 BC
1st Century – 11th Century AD – Compass developed • Chinese invention - south pointing spoon (lodestone) • used as a divining tool in the practice of feng shui • magnetized needles used as direction pointers in the 8th century AD in China • ca. 850 and 1050 common as marine navigational aids
1571 Leonard Digges Invented the Theodolite - England
The Sextant 1730
Early explorers Samuel de Champlain Peter Fidler David Thompson Captain James Cook
Philip Turnor & Peter Fidler Lake Athabasca - 1791 From the book: Canada’s Forgotten Surveyor by Peter Fidler
Peter Fidler Elk Point, Alberta From the ALS News Magazine
Surveyors and Statesmen Mount Rushmore • Three Surveyors and another guy!
George Washington Surveyor 1747-52
Essential • for settlement Early land information system From an ALSA Brochure
Technological Revolution • 1950’s - Geodimeter • Tellurometer • 1970’s - Desk Top Computer • Total Stations • 1990’s - Geographic Information Systems • 1990’s - Satellite Positioning Systems • 2000’s – High Resolution Imagery
Global Positioning Systems Selective Availability Turned off in 2000