The major objective of this paper is to transfer field data stored in the total station memory to a computer . Number of stations is established in the study area . The positions of control points are measured by Global Positioning System ( GPS ) . Electronic Total Station is used to perform horizontal and vertical traversing . The field data are stored in a three dimensional coordinate file. Several serial transportation parameters are tested until the data are downloaded to the computer using T-COM program through an RS-232 interface cable . The total station and the computer operating system must have similar communication parameters . The data must be sent and received simultaneously . Compass rule is used for data balancing . Data are converted into digital plans using Geographic Information System ( GIS ) and Computer Aided Design ( CAD ) programs .