Laser Digital Terrain Mapping System (LDTM)

PavemetricsTM Laser Digital Terrain Mapping System (LDTM) allows for the mapping of road surfaces in 3D with unprecedented accuracy and resolution.

The Laser Digital Terrain Mapping system (LDTM) uses laser line projectors, high speed cameras and advanced optics to acquire high resolution 3D pro­files of the road. This unique 3D vision technology is integrated with GPS and inertial measurement units (IMUs) to accurately track vehicle position and to correct 3D scans for the effect of vehicle motion.

The LDTM acquires road surface data with 1 mm resolution over a 4 m lane width at survey speeds up to 100 km/h. Both 2D image and 3D data are simultaneously acquired at a rate of up to 45 million points per second and are seamlessly merged together into a high accuracy digital terrain map.

Accurate Results in Minutes Not Days

PavemetricsTM data processing tools automatically generate break lines and detect lane markings, road edges, curbs, measure drop-off of unpaved shoulders, road pro­file, curvature, slope and crossfall.

The Most Widely Trusted Sensor

The LDTM leverages Pavemetrics prolific LCMS technology; with more than 100 units in use around the world, the LCMS is hands-down the most widely adopted and trusted sensor of its kind.

The Right Data Formats

Data processing tools included with the LDTM give you the option of creating LAS and Bentley MicroStation formatted files to make incorporating your outputs with the rest of your project easy.

With Room to Grow

The more data items you can collect in a single pass, the more value you can deliver to your clients. Because the LDTM is based on the same sensor hardware as Pavemetrics’ prolific LCMS system, automated pavement condition inspection capability can be added to your LDTM at any time without the need for hardware upgrades.

Key Features

  • Automatic generation of breaklines
  • Detection of road edges, lane markings, curbs
  • Day and night operation
  • Low power consumption
  • High resolution (1 mm) downward images
  • Slope, curvature and crossfall


  • Millimeter accuracy digital terrain models
  • 45 MHz point generation
  • 1 mm longitudinal scanning interval
  • 1 mm transverse resolution