THE ZEISS APPARATUS FOR CROSSING WATER SPANS IN PRECISE LEVELING

Abstract

One of the serious problems encountered in precise leveling is the crossing of water spans which are wider than the maximum sight-distance specified for the order of accuracy desired. This problem is met with some variation of a 'water-crossing' technique which usually involves the two following principles: reciprocal observations, and controlled tilting of the line of sight. Instrumentation to accomplish this measurement is described.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1969
Accession Number
AD0694358

Entities

People

  • Ralph M. Berry

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Attachment
  • Automatic
  • Barometric Pressure
  • Computations
  • Crossings
  • Curvature
  • Deflection
  • Geodetic Surveys
  • Great Lakes
  • Line Of Sight
  • Materials
  • Measurement
  • Micrometers
  • Observation
  • Observers
  • Refraction

Readers

  • Geodesy
  • Systems Analysis and Design