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1 Tisreen University Journal for Researc and Scientific Studies - Engineering Sciences Series Vol. (3) No. (3) 8 8, x, y, z,, s DZ= m DY D m Z Y.1 ١٢٩
2 Tisreen University Journal for Researc and Scientific Studies - Engineering Sciences Series Vol. (3) No. (3) 8 Derivation of Transformation Parameters between WGS84 and Local Datum in Syria Dr. Fayez Deeb Dr. Wael Dayoub (Received 13 / 3 / 8. Accepted 16 / 6 / 8) ABSTRACT Tis paper presents te transformation of GPS coordinates, related to WGS84 datum into local geograpic coordinates, related to Clarke188 datum. Te transformation of tree-dimensional coordinates systems requires tat translation vector and rotation vector and scale factor be known. In tis paper, seven transformation parameters ( x, y, z,,, s ) between WGS84 datum and Clarke 188 datum are derived for Palmyra region, using in bot systems geograpic coordinates of common pointes. Te obtained transformation parameters wen using tree points are presented as follows: '' '' '' D = m, DY = 7.373, DZ= m, 8, 15, 3, s=.1. By increasing te common points (4 ten 5 ten 6), te transformation parameters display no significant canges. Keywords: GPS, Ellipsoid, Geograpic coordinate system, World geodetic system, transformation parameters, sifting, Rotation, Scale factor. Associate Professor, Department of Topograpic Engineering, Faculty of Civil Engineering, Tisreen University, Lattakia, Syria. ** Assistant Professor, Department of Topograpic Engineering, Faculty of Civil Engineering, Tisreen University, Lattakia, Syria. ١٣٠
3 Tisreen University Journal. Eng. Sciences Series ٢٠٠٨ GPS GPS (, Y, Z) Z Y (Nort) LG i (East) Z خط الزوال الغرینتشي G O Y (=9 o E) ١٣١
4 (Clarck a m,b m f 1 : 935 o 34., o Gr Gr K GPS 3 Km, Y 3Km, ( ) ) ١٣٢
5 Tisreen University Journal. Eng. Sciences Series ٢٠٠٨ AIG a= m b= m f= GRS8 Y Local Z Y Rx Y WGS84 Z Z Rx, Y, Z Y=-111 m, Z=431 m Y=68.m, =583m, Z= m =37 m, GPS (, Y, Z) ( N )cos cos Y ( N )cos sin (1) Z [ N (1 e N 1 e ) ]sin N a. Sin ( ) e a b a ١٣٣
6 Clarck 188 Clarck 188 (u,v,w) WGS84 U(u, v,w) ( ) Clarck 188 (x, y, z) U ( 1 S) R U T S T T (u, v,w) R U x, y, z,, s +W= (4) ١٣٤
7 ٢٠٠٨ Tisreen University Journal. Eng. Sciences Series ١٣٥ z w y v x u s z y x v w u w u v w v u (5) u,v,w x,y,z wgs84 x,y,z,s, W A A A T T.. ). ( 1 (6) WGS84 T U R S. ). (1 U = (8) ] ) (1 [ tan 1 1 N N e r Z.5 ) 1 ( Sin e a N N, N Cos r (9) ) ( Y r.1 cc (1) ) ( tan 1 Y
8 x, y, z,, s (LAMBERT) Y(LAMBERT) H ١٣٦
9 Tisreen University Journal. Eng. Sciences Series ٢٠٠٨ _CLARCK188 _CLARCK188 H / // / // m WGS84 WGS84 WGS84 -WGS84 H / // / // m x, y, z,, s D(m) DY(m) DZ(m) S teta( // ) tetay( // ) tetaz( // ) ١٣٧
10 GPS WGS 84 WGS_84 WGS_84 WGS_84 / // / // (m) D(m) DY(m) DZ(m) S teta( // ) tetay( // ) tetaz( // ) GPS WGS 84. ١٣٨
11 Tisreen University Journal. Eng. Sciences Series ٢٠٠٨ 4 relation between number of control points and te sifts in and in Y and in Z" D DY DZ sift (m) number of control Points ١٣٩
12 1- LEICK A., 1995, "GPS Satellite Surveying". Jon Wiley & Sons, New York. - RUSSELL C. BRINKER& ROY MINNICK. 1994, "Te Surveying Handbook". Second Edition, Capman & Hall, New York. 3- Nassar M. M.,1994,"Advanced Geometric Geodesy". Ain Sams University, Egypt. 4- ALMARZOOQI Y., FASHIR H. and SYED ILIAS AHMED, 5, Derivation of Datum Transformation Parameters for Dubai FIG working week,cairo,egypt,5. ١٤٠
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