FR541551A - Perfectionnements aux instruments pour levés topographiques - Google Patents

Perfectionnements aux instruments pour levés topographiques

Info

Publication number
FR541551A
FR541551A FR541551DA FR541551A FR 541551 A FR541551 A FR 541551A FR 541551D A FR541551D A FR 541551DA FR 541551 A FR541551 A FR 541551A
Authority
FR
France
Prior art keywords
refinements
instrument
topographic surveys
topographic
surveys
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
English (en)
Inventor
Francis E Vaughan
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of FR541551A publication Critical patent/FR541551A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C3/00—Measuring distances in line of sight; Optical rangefinders
    • G01C3/26—Measuring distances in line of sight; Optical rangefinders using a parallactic triangle with fixed angles and a base of variable length, at, near, or formed by the object
    • G01C3/28—Measuring distances in line of sight; Optical rangefinders using a parallactic triangle with fixed angles and a base of variable length, at, near, or formed by the object with provision for reduction of the distance into the horizontal plane
    • G01C3/30—Measuring distances in line of sight; Optical rangefinders using a parallactic triangle with fixed angles and a base of variable length, at, near, or formed by the object with provision for reduction of the distance into the horizontal plane with adaptation to the measurement of the height of an object, e.g. tacheometers

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
FR541551D 1921-09-27 1921-09-27 Perfectionnements aux instruments pour levés topographiques Expired FR541551A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR541551T 1921-09-27

Publications (1)

Publication Number Publication Date
FR541551A true FR541551A (fr) 1922-07-29

Family

ID=8930221

Family Applications (1)

Application Number Title Priority Date Filing Date
FR541551D Expired FR541551A (fr) 1921-09-27 1921-09-27 Perfectionnements aux instruments pour levés topographiques

Country Status (1)

Country Link
FR (1) FR541551A (fr)

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