Accession Number : AD0693804

Title :   EXPERIMENTAL TECHNIQUES FOR LEVELS OF HIGH PRECISION USING THE ZEISS Ni2 AUTOMATIC LEVEL.

Descriptive Note : Final rept.,

Corporate Author : UNITED STATES LAKE SURVEY DETROIT MICH

Personal Author(s) : Berry,Ralph Moore

Report Date : JUL 1969

Pagination or Media Count : 28

Abstract : Instrumentation and Techniques developed by the U. S. Lake Survey for levels of high precision are described. Automatic, or 'self-leveling' Zeiss Ni2 instrument is used with plane-parallel plate micrometer. Special techniques are used to compensate for systematic errors unique to automatic levels. Levels can be run with these methods to a tolerance of 1.5 millimeters times the square root of the length of the section in kilometers. (Author)

Descriptors :   (*GREAT LAKES, NAVIGATION), (*GEODESICS, INSTRUMENTATION), (*SURVEYING(GEOGRAPHIC), GREAT LAKES), AUTOMATIC, ERRORS, SENSITIVITY, ACCURACY, MICROMETERS, HYDROLOGY

Subject Categories : Geodesy
      Hydrology, Limnology and Potamology

Distribution Statement : APPROVED FOR PUBLIC RELEASE