Network design aims to maintain a robust statewide control network using high-precision GNSS and geodetic leveling. This network provides the basis for the horizontal and vertical location of what?

• A. Weather data collection
• B. Satellite launch trajectories
• C. Agricultural zoning
• D. Transportation improvement projects and facilities

Answer: (D)

A robust statewide control network with high-precision GNSS and geodetic leveling provides a stable geodetic reference frame that defines exact horizontal positions and elevations. This means you can pinpoint where features sit on the map and what their elevation is relative to a vertical datum, which is essential for designing, locating, and constructing transportation infrastructure. Roads, bridges, airports, and rail facilities rely on this shared reference to ensure accurate alignments, profiles, elevations, and staking during construction. The other options don’t depend on this kind of foundational surveying framework for their primary location reference. Weather data networks, satellite launch trajectories, and agricultural zoning come from different systems and considerations not anchored to a statewide geodetic control network.