RSFP-X90 in action

Control Point vs. Resumption Point

One Reference Point for All Instruments

Modern construction, surveying, laser scanning, and monitoring projects depend on accurate reference points. Yet many workflows still create separate points for separate tasks, introducing unnecessary complexity, setup time, and opportunities for error.

A survey control point establishes the known X, Y, Z coordinates for a project.

A resumption point allows teams to return later and continue working from the exact same physical reference location.
Traditionally, these have often been treated as two different things.

The  Rothbucher Systeme One Point Fits All (OPFA) System was designed to combine both into one repeatable workflow.
What Is a Control Point?  

What Is a Resumption Point?
A control point is the foundation of a coordinate system.   A resumption point is designed for repeatability.
It provides:   It allows teams to:
  • Known X, Y, Z coordinates
  • Stable positioning
  • A reference for total stations, GNSS, scanners, drones, and monitoring systems
  • Project-wide consistency
  
  • Return to the same setup location later
  • Resume work without rebuilding control
  • Maintain consistency between instruments and trades
  • Continue monitoring over long periods of time
Control points are essential for:   Resumption points are especially valuable on:
  • Construction layout
  • Survey control networks
  • Laser scanning registration
  • Drone ground control
  • Rail and structural monitoring
  • BIM and VDC workflows
  
  • Large construction sites
  • Data centers
  • Rail infrastructure projects
  • Industrial facilities
  • Long-term monitoring projects
  • Reality capture workflows
 

The Problem with Traditional Workflows

On many projects, separate reference points are created for:

• Total stations • Laser Scanners • Drone Targets • Monitoring prisms • Reflective Targets • Layout verification

Each new point introduces:

• Additional setup time • More opportunities for error • Coordinate inconsistencies • Rework between trades  • Confusion over which point is “correct”

Over time, temporary marks are often disturbed, covered, removed, or recreated differently.

 

The Rothbucher OPFA Solution

The Rothbucher OPFA System creates one permanent, repeatable reference point that can be used across multiple instruments and workflows.

Using the correct OPFA offset, surveyors can maintain the same XYZ coordinates while switching between:

Mini prism RSMP390Mr-S 220 degree mini prism RSMP490Mg-C Laser Scanner Target RSL422M Laser Scanner Sphere RSLB10M
Mini prisms 220 degree prisms Laser scanner targets Laser scanner spheres
Scanner- and drone target RSL632M GNSS adapter RS0195M RS monitoring accessories
Drone targets GNSS adapters Monitoring accessories

The result: One Reference Point for All Instruments

 

Why It Matters
✅

Reduce Rework
Eliminate the need to recreate or translate reference points between trades and instruments.
✅

Improve Repeatability
Return days, weeks, or years later to the same physical point with confidence.
✅

Maintain Coordinate Consistency
Preserve the same XYZ coordinates across surveying, scanning, monitoring, and layout workflows.
✅

Simplify Multi-Trade Projects
Give surveyors, VDC teams, scanning crews, and contractors a common reference system.
✅

Create Long-Term Permanent References
Ideal for monitoring, industrial facilities, transportation infrastructure, and data centers.

 

NEW: Custom Laser Engraved Fixed Points

The latest RSFP-X90, RSFP-X92, and RSFP-X93 fixed points can now be custom laser engraved for project identification and long-term site clarity.

Custom engraving options may include:

• Control point names • Grid lines • Axis numbers • Elevation references • Monitoring IDs • Building sections • BIM/VDC references

Engraved Fixed Points RSFP-X90-B variants

This helps make permanent reference points easier for multiple trades to identify, understand, and protect throughout the life of the project.

Learn more about custom engraved fixed points: RSFP-X90 / X92 / X93 Fixed Points

Engraved Fixed Points

Applications
The OPFA System is used worldwide for:
  • Data centers 
  • Rail monitoring
  • Tunnel construction
  • Industrial plants
  • BIM/VDC coordination
  • Laser scanning and LiDAR workflows
  • Bridge monitoring
  • Infrastructure projects
  • Public safety and forensic documentation