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Mapping redefined at millimeter precision.

LDTM delivers survey-grade 2D and 3D terrain models at highway speed — in a single seamless pass.

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Millimeter precision

1 mm resolution over a full 4 m lane width.

Survey-grade speed

Collects up to 45 million points per second at up to 100 km/h.

Seamless integration

Combines 2D images, 3D profiles, GPS and IMU for unmatched accuracy.

Fast results

Automatically generates breaklines, curbs, edges, slopes, crossfall and more.

Trusted technology

Built on Pavemetrics' widely deployed LCMS® platform, with 100+ units worldwide.

The Pavemetrics® Laser Digital Terrain Mapping System (LDTM)

The Pavemetrics® Laser Digital Terrain Mapping System (LDTM) uses advanced laser line projectors, high-speed cameras, and optics to acquire high-resolution 3D profiles of the road surface. Combined with GPS and inertial measurement units (IMUs), the system corrects for vehicle motion and accurately geo-references every scan.

In one pass, the LDTM simultaneously acquires 2D imagery and 3D point cloud data—seamlessly merging them into a high-accuracy digital terrain map.

  • Automatic generation of breaklines

    Generates accurate breaklines directly from 3D data.

  • Detection of road edges, lane markings, and curbs

    Identifies all key roadway features in a single pass.

  • Day and night operation

    Works reliably regardless of lighting conditions.

  • Low power consumption

    Efficient design optimized for survey vehicles.

  • High-resolution (1 mm) downward images

    Captures millimeter-scale detail across the full lane.

  • Slope, curvature, and crossfall measurement

    Provides complete geometric parameters of the roadway.

  • Millimeter-accuracy digital terrain models

    Delivers survey-grade elevation maps.

  • 45 MHz point generation

    Captures up to 45 million points per second.

  • 1 mm longitudinal scanning interval

    Ensures dense, high-resolution coverage.

  • 1 mm transverse resolution

    Provides precise detail across the entire 4 m lane width.

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