The process of building elevation control networks by theodolite electronic machine technology in the area of University of Agriculture and Forestry. The results show that from 01 level point original known elevation (G1) was chosen as the starting point and 10 point control network measured by GPS technology known in the area, the project has identified elevation points with the wrong number: mean square weighted deviation units. mo = +/- 0.78mm / km
mean square weakest elevation point: mH (GPS 12) = 1.52 (mm)
mean square weakest height difference: m (G1 - GPS01) = 1.41 (mm). Thus, surveying elevation control network in the area of Thai Nguyen University of Agriculture and Forestry is aiming for ensuring quality requirement, high precision, tight mesh and full conditions in order to set up detail topographic map.