Terrex Spatial is Terrex's inhouse surveying and GIS specialist department. Terrex Spatial was developed through the acquisition of Dynamic Satellite Surveys (DSS), a 22 year veteran seismic and engineering survey company, in July 2011.


Terrex Spatial currently provides services to Terrex's seismic crew's as well as Regional Government, Local Council, Coal Mining and building companies.


Terrex Spatial are industry innovators who actively source the most advanced equipment, utilising the latest in Rapid Elevation Meter (REM) barometric levelling, GPS mounted bulldozer guidance systems and real-time GIS and GPS applications. Terrex Spatial continuously invests in new technology and Research & Development, always seeking advanced applications to further improve acquisition quality, productivity and safety.


Terrex Spatial operates with ISO 9001 Quality, OHSAS 18001 and AS 4801 Health and Safety and ISO 14001 Environmental Accreditation and Certification, audited by SAI Global.


Terrex Spatial provides the following surveying services:


Seismic Exploration Surveys

Terrex Spatial undertakes all the line pointing and line surveying requirements of each seismic survey. Line pointing and surveying utilise the latest GPS technology, operated by experienced field personnel with particular expertise in seismic GPS surveying.


Through the synergies experienced by combining LiDAR or Geo-Eye, environmental and cultural heritage surveying and GPS technology, Terrex Spatial is able to efficiently pre-plan seismic surveys. This effectively minimises the potential impacts to culture and environment, as well as reducing exposure to hazards for all field staff.


Geodetic Control Surveys

Applications for accurate geodetic surveys include:

  • Geodetic control surveys
  • Well location surveys
  • Control for aerial photography
  • Pipeline surveys
  • Control for LiDAR
  • Subsidence monitoring surveys


Gravity Surveys

Using a LCR Gravity Meter, the Terrex Spatial team has developed techniques that combine the latest in GPS, Gravity meters and computing technology, to provide accurate and cost-effective surveys.


Hi-Res LiDAR Aerial Mapping

LiDAR is a cost-effective addition to land seismic data acquisition programs and provides valuable spatial solutions for our clients. Terrex Spatial's High Definition LiDAR offers a shift in the level of detail and accuracy attainable in the mapping of terrain, infrastructure and vegetation.


The innovative, air-borne technology scans the ground with an array of laser pulses which record and depict ground formations. Once processed, the featured physical surface can be mapped to an extremely high resolution. Using this technology, Terrex Spatial can provide a fast and efficient method to attain high resolution imagery and topography over a large area.

LiDAR data can be flown early in the project life cycle and used initially to produce digital terrain models, contours and ortho-photography. This dataset provides a valuable tool during the survey planning stage, reducing and focusing the efforts for on-ground scouting. Through better pre-planning, environmental impact and H&S exposure for field staff is reduced.


Digital Terrain Modelling

Accurate, cost-effective surveys using GPS and computing technology for applications including:

  • Digital terrain modelling
  • Irrigation planning
  • Flood studies
  • Subsidence monitoring surveys
  • Rehabilitation surveys


GIS Applications

The integrity of any GIS is determined by the quality and organisation of its spatial data. Terrex Spatial uses GIS Services to capture, store, analyse, manage, and present data with reference to geographic location data for the following surveys:

  • Data transformation and conversion
  • Capture of Digital Road Centreline and footpaths
  • Infrastructure and asset mapping
  • Data analysis
  • Aerial photo control
  • Customised GIS solution


Digital Cadastral Database (DCDB) Upgrades

Terrex Spatial has adjusted more than 100,000 cadastral parcels throughout Australia for local councils and shires. The DCDB (Digital Cadastral DataBase) is a digitised data set of cadastral boundaries whose spatial accuracies range from 100mm to 500 metres. Updating the database is completed using a system whereby metes and bounds for all cadastral parcel boundaries are entered into a database, cadastral corners linked to accurate on-ground control and least squares analysis is undertaken, cadastral boundaries are able to be upgraded to an accuracy of 100mm (at the 95% confidence interval).