Groundwatch PH

Electromagnetic and GPR Surveys

3D GPR Imaging

Groundwatch uses 3D GPR when projects need clearer plan-view target continuity than a few 2D lines can provide, especially in congested utility zones.

Definition

What this method is

3D GPR imaging is a dense grid-based radar survey approach that produces depth slices and volumetric interpretation for shallow subsurface targets.

Groundwatch uses 3D GPR when projects need clearer plan-view target continuity than a few 2D lines can provide, especially in congested utility zones.

How It Works

From field measurement to interpreted model

  1. 1A high-density survey grid is designed based on target size, spacing, and depth objective.
  2. 2Closely spaced GPR lines are acquired with position control and field QA across the full grid.
  3. 3Processing generates depth slices and target continuity maps for engineering and construction planning.

When to Use

Best-fit conditions for this method

  • Complex utility corridors where 2D lines are insufficient
  • Shallow anomaly screening that needs depth-slice visualization
  • Pre-excavation planning in dense urban or industrial footprints

What It Can Help Identify

Subsurface features and signals

  • Utility clustering and crossing patterns
  • Shallow anomaly continuity across a mapped area
  • Priority zones for verification before excavation

Deliverables

What you receive

  • Grid acquisition and QC summary
  • Depth-slice maps by interval
  • Interpreted target overlays for planning teams

Typical Outputs

What the data looks like

  • Plan-view amplitude depth slices
  • Target continuity maps
  • Annotated verification-priority zones

Applications

Common applications in the Philippines

Urban utility planning and conflict checks

Industrial facility upgrade and expansion works

Infrastructure investigations requiring plan-view depth context

Method Limitations

What this method cannot do alone

  • Interpretation quality depends on grid density, antenna selection, and site noise conditions.
  • Highly conductive soils or reinforced surfaces can reduce radar penetration and clarity.
  • 3D imaging improves spatial context but still requires direct verification for critical decisions.

Geophysical results are interpreted models based on measured physical property contrasts. Results should be correlated with boreholes, test pits, drilling, geological mapping, laboratory data, or other direct investigation methods where required.

Related Services

Methods and applications that work together

FAQs

Frequently Asked Questions

When should 3D GPR be used instead of 2D GPR lines?

3D GPR is preferred when target continuity, congestion mapping, or area-wide depth-slice interpretation is needed for decision-making.

Does 3D GPR provide exact object identification?

No. It provides stronger spatial interpretation, but object confirmation still depends on integrated review and field verification.

What affects 3D GPR data quality?

Key factors include antenna frequency, line spacing, positioning quality, ground conductivity, and environmental noise.

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