Kajian Penentuan Posisi Jaring Kontrol Horizontal Dari Sistem Tetap (Dgn-95) Ke Srgi (Studi Kasus : Sulawesi Barat)

Based on law No. 4 of the year 2011 about Geospatial Information, BIG (Geospatial Information Agency) as one of the government agencies have a duty to provide geodetic control points. Before BIG set the SRGI as datum reference for Indonesia, Indonesia has used the National Geodetic Datum 1995. Change of use of the datum it is also influential on the determination of positions in Indonesia. Based on the foregoing it is necessary of a measurement as well as research at point Horizontal Control Network in order to find out how big a difference a coordinate obtained by using the processing system in DGN-95 and SRGI 2013 as well as getting seven parameters that are used in the transformation of coordinates.This research using 12 observation data horizontal control network in West Sulawesi in 2015. The point IGS used are 20 IGS stations and 8 CORS stations Indonesia. Data processing using software GAMIT 10.6. Velocity rate calculation and deformation models signifies change the coordinate value on the function of time. By using such methods, the obtained coordinates SRGI 2013.This research resulted in the value of coordinate statik system DGN-95, SRGI2013 and generate great velocity rate at each point of observation. Estimates solution best transformation parameters from DGN-95 to SRGI obtained in this study are: Tx = -0.0918, Ty = 0.0098, Tz = -0.0195, λ = 0.999999989, k = 1.19326 x 10-08, θ = -3.72529 x 10-07, ω = -5.58794 x 10-09