OBSERVATIONAL TECHNIQUES FOR USE WITH COMPENSATOR LEVELING INSTRUMENTS FOR FIRST-ORDER LEVELS

It has been demonstrated that compensator leveling instruments can produce first-order levels if appropriate observational techniques are used. Although the compensator is capable of controlling the attitude of the line of sight with adequate accuracy, it is subject to certain unique errors which, if not corrected, will introduce systematic errors that will produce significant discrepancies. Study of the sytems of observation and of the mechanics of the compensator has revealed the nature of certain of these errors. The general principles and mechanical nature of compensators are discussed, and a suggested observational routine that will provide a maximun protection against systematic error is presented. /Author/

• Corporate Authors:

  American Congress on Surveying and Mapping

  Woodward Building, Room 430, 733 15th Street, N W
  Washington, DC  United States  20005
• Authors:
  • Berry, R M
• Publication Date: 1977-3

Media Info

• Features: Figures; References;
• Pagination: p. 17-23
• Serial:
  • Surveying and Mapping
  • Volume: 37
  • Issue Number: 1
  • Publisher: American Congress on Surveying and Mapping

Subject/Index Terms

• TRT Terms: Control devices; Errors; Leveling; Surveys
• Uncontrolled Terms: Electromechanical devices; Observation
• Old TRIS Terms: Angle of external friction; First order surveys
• Subject Areas: Design; Highways;

Filing Info

• Accession Number: 00163654
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 13 1978 12:00AM