Accession Number : ADA195723

Title :   DATATRAN: Datum Transformation Software.

Descriptive Note : Technical rept.,

Corporate Author : ARMY ENGINEER TOPOGRAPHIC LABS FORT BELVOIR VA

Personal Author(s) : Niles, Anthony R

PDF Url : ADA195723

Report Date : 14 Jan 1988

Pagination or Media Count : 10

Abstract : The North American Datum of 1927 (NAD27) has become unsuitable for present-day surveys. Satellite surveys and accuracy requirements of conventional surveys have dictated the need for a more accurate earth-centered datum. Thus, the North American Datum of 1983 (NAD83) is replacing the NAD27. In anticipation of this transition, The National Geodetic Survey developed a computer program to convert survey data from NAD27 to NAD83, or vice-versa. This program, called LEFTI, converts geodetic positions (latitude/longitude) using a least squares adjustment. Since Corps of Engineers' Districts often use state plane coordinates, two other programs were developed to convert between geodetic positions and state plane coordinates on either datum. Thus, if a user desired to convert between NAD27 and NAD83 using state plane coordinates, two or more program runs were required. The output from one program was used as the input to the next program. In order to simplify this process, USAETL combined all three programs into one software package, called DATATRAN. This report concentrates on the program capabilities and procedures for use with only brief and general mention of conversion technique. Keywords: Least squares routine. (edc)

Descriptors :   *COMPUTER PROGRAMS, *GEODETIC SURVEYS, ACCURACY, ARMY CORPS OF ENGINEERS, ARTIFICIAL SATELLITES, CONVERSION, GRIDS(COORDINATES), LATITUDE, LEAST SQUARES METHOD, LONGITUDE, REQUIREMENTS, TRANSFORMATIONS(MATHEMATICS), NORTH AMERICA, POSITION(LOCATION), SUBROUTINES

Subject Categories : Geodesy

Distribution Statement : APPROVED FOR PUBLIC RELEASE