Geophysical software & survey instruments

See what
the earth hides.

TERRA — earth. SCRY — to discern what is hidden.TERRASCRY: seeing what the earth hides.

Geophysical instruments and survey software

We’re building tools to investigate graves, search for unexploded ordnance (UXO), and map wreckage and buried structures. TERRASCRY combines ground measurements with maps and site records to help teams decide where to look more closely.

Explore the survey workflow Request a briefing

Product development · Evaluation and procurement inquiries welcome

The survey, in contextInterface design concept
Design concept showing survey paths and modeled anomalies over riverbank imagery, with layers and properties alongside the map.
Map, measurements, and interpretation in one view. Design concept with illustrative geography and signals; not a survey result.

Our mission

What we’re
looking for.

A grave may leave disturbed soil; a crash site may leave scattered metal. We’re building TERRASCRY to investigate these traces, search for buried ordnance, and map structures and excavations beneath the surface.

01Burial sites

Graves and disturbed ground.

Look for backfilled grave shafts and changes in the surrounding soil. Survey results can guide an investigation; they do not confirm human remains.

02UXO discovery

Unexploded ordnance.

Locate metal anomalies that could be buried ordnance. Identification and clearance belong to qualified UXO specialists.

03Crash sites

Aircraft wreckage and debris.

Map buried fragments, components, and debris concentrations to help establish the extent of a crash site.

04Buried structures

Trenches, pits, and filled craters.

Investigate earlier structures and excavations where their materials or fill differ from the surrounding ground.

These are intended uses for instruments still in development. What a survey can reveal depends on the target, its depth, the surrounding ground, and how measurements are collected.

Intended survey workflow

From a surface survey
to a closer investigation.

Use TERRASCRY to prepare surveys and review recorded measurements. Pathfinder is intended to locate areas worth a closer look. Where appropriate, HIRT adds a focused investigation between inserted probes.

  1. 01Screen the surfacePathfinder
  2. 02Investigate a selected volumeHIRT · optional follow-up
  3. 03Compare and interpretTERRASCRY

01 · Pathfinder

Walk survey lines.
Map changes in the ground.

A harness-supported instrument is designed to collect measurements along walking routes. Magnetic gradiometry measures changes in the magnetic field; above-ground electromagnetic coils add information about conductive soil and metal, including non-ferrous metal.

  1. Cover the area. Record the instrument’s position as measurements are collected along survey lines.
  2. Look for contrasts. Compare magnetic and conductivity responses with the surrounding ground.
  3. Select follow-up areas. Review unusual responses alongside site records and terrain before planning closer investigation.
Inspect Pathfinder hardware
Surface surveyDesign schematic
Pathfinder surface survey lines and areas for follow-upParallel walking routes cross a survey area. Two illustrative response concentrations stand out from the surrounding ground; one is outlined as an area for closer investigation. They are not identified objects.
Walking route Response concentrationIllustrative responses guide follow-up; they do not identify a buried object.

02 · HIRT

A probe grid.
Measurements between probes.

HIRT means Hybrid Inductive-Resistivity Tomography. Its design places sensing elements at known positions and depths within a selected area. Measurements across different probe combinations help constrain a three-dimensional model of that volume.

  1. Define the investigation volume. Plan probe positions around the area of interest, with site-specific access and safety assessment.
  2. Measure complementary responses. Inductive coils and electrical contacts provide different information about the ground.
  3. Estimate the structure. Combine many measurements to investigate the position and extent of physical-property contrasts.

HIRT requires ground insertion. On suspected hazardous ground, qualified assessment and clearance come before insertion. Probe count, spacing, depth, and suitability depend on the site.

Inspect HIRT hardware
Probe-grid investigationDesign schematic
HIRT probe grid and subsurface investigation volumeNine illustrative vertical probes form a surface grid and extend into a subsurface volume. Surface electronics connect the probes. Shaded regions represent a conceptual sensing relationship across the volume, not computed sensitivity or straight-ray paths. TXRX ABMN

Induction · coilsA transmitting coil produces a changing magnetic field. Receiving coils measure the response, providing information about conductive materials between and around the probes.

Probes Illustrative property contrastIllustrative grid and sensing regions; spacing and coverage vary by survey.

03 · TERRASCRY software

Turn measurements
into an interpretation.

Survey readings are evidence. A subsurface model is an estimate built from those readings and physical assumptions. TERRASCRY is being developed to compare them with terrain, imagery, and site records—and make uncertainty visible before a team decides what to investigate next.

Explore the software

Live acquisition and broader sensor integration are still in development.

Survey instruments

Hardware for surface
and probe-grid surveys.

Pathfinder is designed for surveying on foot. HIRT uses a probe grid to investigate a selected area. Both instruments are in development.

CAD render of the complete Pathfinder handheld assembly, showing its frame, controls, and three sensor stations.
Pathfinder handheld assembly · CAD renderDevelopment geometry; illustrative materials and finish.
P / 01In development

Pathfinder

Handheld magnetic and electromagnetic surveying

The design pairs magnetic sensors with electromagnetic coils to measure changes across a site, recording the position of each reading.

Intended role Walk survey lines and map areas that warrant a closer look.

Discuss Pathfinder
Enlarged CAD cutaway of the HIRT sensor module, showing its housing and internal sensing components.CAD render of the complete HIRT probe string with tip, rod sections, two sensor bodies, and cable-exit cap.
HIRT sensor cutaway and probe assembly · CAD rendersSensor detail enlarged; short-rod inspection configuration.
H / 02In development

HIRT

Crosshole subsurface imaging

The design uses coils and electrodes on inserted probes to measure the ground between them. Those readings help estimate how conditions change with position and depth.

Intended role Investigate the shape and extent of a feature within a probe grid.

Discuss HIRT

Contact us for current specifications and evaluation plans. These are CAD renders of designs under development; bench and field qualification are still ahead.

TERRASCRY software

Readings and models
in one view.

Review recorded readings beside terrain, aerial imagery, and a model of the ground. Check where a signal came from and how the interpretation fits the site.

3D interface design concept showing terrain, a subsurface model, and a linked cross-section.
3D and section design concept. Illustrative geometry and signals.

Map, 3D & cross-section

Inspect the same site
from multiple views.

Move between the map, a 3D view, and a cross-section. Compare terrain and imagery with recorded readings and modeled results.

  • Keep source measurements distinct from model outputs
  • Inspect layers, depth bands, and selected features
  • Retain notes and the context behind an interpretation

Site preparation

Organize sources
before interpretation.

Bring together earlier surveys, maps, and imagery. Check what each source covers and where information is missing.

In development: recorded magnetic survey workflows, terrain and imagery, local run records, and model inspection. Broader sensor integration and live field acquisition are ongoing work.

Site-preparation design concept showing a site map with source layers, coverage, and offline planning controls.
Site-preparation design concept. Source details and coverage are illustrative.

Government, universities & institutions

Start with the
technical requirements.

We’re building for government survey teams, researchers, and commercial operators. Bring us a site, a dataset, or a measurement problem to discuss.

Technical evaluation

Tell us what you need to find, where you work, and what evidence you need before taking an instrument into the field.

Procurement planning

Ask about specifications, evaluation plans, development schedules, and support before planning a purchase.

Research collaboration

Discuss field studies, reference datasets, instrument testing, and methods development.

Request a technical briefing

Product & partnership inquiries

Discuss your
survey requirements.

Contact us about TERRASCRY software, Pathfinder or HIRT instruments, technical evaluation, or future procurement.

Contact TERRASCRY