Mapping & Design Data
Survey Control
Are all our crews and datasets working from the same reference?
Also called: control survey, geodetic survey, gnss / gps control, benchmarks, or ground control points.
Understanding the work
Control surveys set and measure reference points using GNSS, total station, and differential leveling. They give a project a single, verified coordinate and elevation framework, including ground control for aerial and drone mapping.
- Large construction projects
- Drone & aerial mapping
- GIS & municipal mapping
Who it’s for
- Large and phased developments
- Aerial mapping and drone providers
- Teams combining several surveys
Typical work involved
- Control planning and monument setting
- GNSS, traverse, and leveling observations
- Network adjustment and datum checks
The result
What you’ll receive
- Control point network
- Coordinate & elevation report
- Ties to NAD 83 / NAVD 88
Common questions
What clients ask about this work
What coordinate system will my drawing use?
The project should specify its datum, units and coordinate system. If you need Florida State Plane or another grid, tell us before work begins.
Can you establish project control for multiple crews?
Control surveys can create a common coordinate and elevation reference. The scope should define datum, accuracy and how others will use it.
What is a benchmark?
A benchmark is a reference point with an established elevation. Survey crews use suitable benchmarks and control to relate project measurements.
Scope, applicable standards, accuracy, deliverables, timing, and price are confirmed in writing for each project.