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Title: ADJUSTMENT OF STATE PLANE COORDINATES
Accession Number: 00202703
Record Type: Component
Abstract: THE SYSTEM OF PLANE COORDINATES ESTABLISHED ON SEA LEVEL DATUM BY THE U.S. COAST AND GEODETIC SURVEY FOR EACH STATE IS A UNIFIED METHOD FOR COORDINATING ALL TYPES OF SURVEYS, WHETHER PLOTTED TO SMALL OR LARGE SCALE. MOST OF THE DISTANCES, HOWEVER, FROM COORDINATES ON MAPS CONTROLLED BY AND COMPILED ON SUCH A SYSTEM, WILL NOT AGREE WITH DISTANCES ON THE GROUND UNLESS SCALE CORRECTIONS ARE APPLIED. THIS EFFECT BECOMES ESPECIALLY CONSEQUENTIAL WHEREVER THE MAPS ARE COMPILED AT LARGE SCALE. TO CIRCUMVENT THE NEED FOR CORRECTION OF EACH MAP DISTANCE, AS IT IS USED FOR ENGINEERING, CADASTRAL, OR OTHER PURPOSES, IT IS EASY TO COMPUTE PROJECT COORDINATES BY USE OF A COMBINED SCALE AND ELEVATION ADJUSTMENT FACTOR APPLIED TO THE SYSTEM OF STATE PLANE COORDINATES. WHEN THIS IS DONE BEFORE THE MAPPING IS ACCOMPLISHED, THERE IS NO NEED FOR SCALE CORRECTION BECAUSE DIFFERENCE IN COORDINATES AND DISTANCES ON THE MAPS WILL AGREE WITH HORIZONTAL DISTANCES MEASURED ON THE GROUND. WHENEVER STATE PLANE COORDINATES AT SEA LEVEL DATUM ARE REQUIRED, THEY CAN BE COMPUTED FROM THE PROJECT COORDINATES BY REVERSE USE OF THE ADJUSTMENT FACTOR. THE PRINCIPLES OF STATE PLANE COORDINATES AND METHODS OF THEIR ADJUSTMENT FOR LARGE-SCALE ENGINEERING SURVEYS ARE DISCUSSED. /AUTHOR/
Supplemental Notes: No 199, pp 2-13, 6 FIG, 2 TAB Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
Monograph Title: Monograph Accession #: 01408187
Authors: Pryor, William TDiscussers: Simmons, L G
Pagination: 12p
Publication Date: 1958
Serial: Media Type: Digital/other
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Design; Highways; Hydraulics and Hydrology; Maintenance and Preservation
Files: TRIS, TRB
Created Date: Sep 16 1994 12:00AM
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