Machine control, Takeoff and Drone Data Education and News

Unlocking Precision and Efficiency in Concrete Paving: 3D Machine Control Models for Curb and Gutter Machines

A 3D curb and gutter model is a digital version of the curb layout shown in construction plans. It guides slipform machines using GPS/laser or robotic total stations, eliminating the need for stringline. The model includes alignments, elevations, profiles, and transitions—helping crews place curbs accurately on the first pass.

Zach Pieper

CR-H1 handheld scanner capturing a gravel stockpile at a construction site (Image Credit: Topcon)

Topcon's CR-H1: Handheld 3D Capture

Topcon's CR-H1 is a compact, one-handed 3D capture tool that pairs an iPhone with the HiPer CR GNSS receiver. Walk a site and generate georeferenced point clouds on the spot — no tripod, no setup hassle. Processed through Pix4D, it produces colorized models built for construction verification, stockpile measurement, and pre-con walkthroughs. Quantum Land Design can take those scans and turn them into refined grading models and volume calculations.

Quantum Land Design

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Infographic showing 4 GPS site control principles for machine control: use the design engineer's surveyor, surround the site with control points, calibrate to 5 or more points, and trust but verify with daily checks.

Get Your 3D Grading Under Control: 4 Site Control Principles Every GPS Contractor Needs to Know

Poor site control is the number one problem we see from contractors running GPS machine control. Not bad models or broken equipment. Site control, the first step on every single project. We've seen it cost contractors two weeks of production, turn a correct machine control model on a balanced site into a mysterious site export, and force concrete footings to be redone because the control was rotated 2.8 degrees. Every one of those situations was avoidable.

A screenshot from a drone flight planning interface titled “DJI Mavic 3E Flight Planning for Topographic Survey Mapping” shows a mapped area with a green grid overlay and waypoint markers on the left. On the right, advanced settings display sliders for side overlap ratio (80%), frontal overlap ratio (80%), and margin distance. A note emphasizes that 80% overlap provides good photogrammetry results and should not be set below 70% for 3D mapping. A YouTube play button is centered over the image.

Quantum Flight Pack - DJI Mavic 3E Training Hub

If you're running a DJI Mavic 3E on a construction site, this is where to start. These training videos cover flight planning, RTK setup, camera settings, and calibration — everything you need to get clean topo data that works with your GPS machine control system.