Site survey plays an important role before deciding to build a project. Terrain surveys help determine the location of the construction items, assess the specific conditions of the route to survey. Serving the planning, formulating investment projects, designing civil, industrial, transportation and irrigation projects.

- Set up the control net by electronic or GPS.

- High level control net.

- Measure map at 1: 5,000 scale; 1: 2,000; 1.1000; 1,500; 1: 200 on land and under water.

- Measure longitudinal, cross-sectional, terrain and underwater cross-sections.