Surveying and Mapping for Design and Setting out Plant of Suratpathong Surat Thani Province

Abstract

Setting four horizontal and vertical control points distributed over the project area, reference to two GPS monuments of Department of Rural Roads. The accuracy of control points are better than Order C1-II of FGCC1989. Photogrammetric mapping by drone and Pix 4D Program. For mapping, coordinates and elevations of objects and ground points are determined from Orthophotos and also by Robotic Total Station and by RTK. By checking 9 well-defined points, map accuracy conforms to Equivalent Map Scale 1:500 for Standards of EIT and ASPRS at 95% confidence level. And setting out coordinates of buildings as specified in designed map for 11 points at 95% confidence level, conforming to Standards of EIT and FGDC Geospatial Positioning Standards.