Processing & Imaging

SGC provides a complete data processing, imaging, GIS and interpretation capability, using an extensive range of commercial and in-house software. The processing capability is based on an integrated network of powerful PCs and state of the art ancillary equipment, including A0 inkjet plotters. All processed data, images, contours and interpretation plans can be provided in digital and GIS formats.

Hardware

• Windows & Linux Server
• Twenty-five work stations
• Three HP A0 Designjet plotters
• A0 digitiser
• Scanner
• Ultrium tape drives
• Exabyte tape drives
• Trakker tape drives
• Nine track reel tape drive
• DVD & CD writers
• Notebook computers
• Modems
• Internet domain (sgc.com.au)
• Numerous printers

Data Processing

SGC's data processing system includes the INTREPID, ER MAPPER, GEOSOFT, ENVI, SURFER and GRAPHER packages, complemented by extensive SGC developed software. Capabilities include:

• Gridding
• Contouring, profiles, flight path maps, merging
• Derivatives and Continuations
• Analytic signal and reduction to pole transformations.
• Euler and Werner deconvolutions
• Levelling of aeromagnetics
• 256 channel radiometric processing
• Radiometric ratios
• Magnetic and gravity depth slicing
• Conductivity depth sections from ground and airborne EM
• EM decay curve analysis
• Down hole EM profiling and 3D viewing
• IP pseudosections and pseudo-depth sections
• Digital Terrain Models
• Landsat and Spot analysis and presentation
• Principal component analysis (Landsat, radiometrics)
• 2D & 3D IP Inversion
• 3D Magnetics & Gravity Inversion
• 1D & 2D Electromagnetic modelling

Imaging Services

SGC offers a state of the art image processing service, using proprietary and commercially available software including ER Mapper, INTREPID, Geosoft, Geopak and MicroBrian. The group has extensive experience in enhancement and imaging of airborne and ground geophysical data (eg. magnetics, radiometrics, gravity, EM, and digital terrain), multispectral scanner, radar, multispectral and panchromatic satellite data.

All images can be supplied as accurately scaled, located and annotated report quality output (paper, film or photographic) or in digital form (in Mapinfo or Arvciew format).

Typical imaging options include:

• Directional Illumination
• Derivatives
• Continuations
• Multi-band combinations
• Principal Component Analysis
• Ratios
• Equal Area Enhancement
• Automatic Gain Control
• Reduction to Pole

GIS Services

A comprehensive GIS and CAD drafting service is provided in-house, built around the MapInfo and ARCVIEW GIS packages. Software used includes:

• MapInfo
• Discover
• Arvciew
• Interdex
• Corel Draw

Interpretation Software

Interactive 2- or 3D modelling and analysis software for airborne (magnetics, radiometrics, EM), ground (eg. magnetics, gravity, EM, induced polarisation) and down hole (eg. EM, magnetics, IP, resistivity) data is used in the interpretation process. Automatic depth estimation/depth slicing routines are available for magnetics, gravity, IP and EM. These include Werner & Euler deconvolutions (magnetics), Spiker & Nekot (EM), 2D & 3D IP inversion & forward modelling, 3D Magnetic & gravity inversion.

Commercial Modelling and Interpretation packages include:

• POTENT - Windows-based 2D and 3D forward and inversion modelling of magnetics and gravity
• FILAMENT - Windows-based forward and inversion modelling of fixed loop and down-hole EM
• MULTILOOP - Forward Modelling - Surface and Downhole EM
• PCIP - Windows Based Forward 2D IP/Resistivity Modelling
• MAXWELL - Windows Based - forward and inversion modelling of surface, downhole and airborne EM
• WINDISP - Windows Based - presentation of model surfaces, drill holes, surface vectors in 3 dimensions. Linked to the UBC magnetic inversion package
• PROFILE ANALYST - Windows Based - presentation of multi-channel geophysical datasets. Particularly useful for airborne EM
• MAG3DINV - UBC 3D magnetic inversion program
• RES3DINV - 3D IP inverison by GeotomoSoftware
• RES2DINV - 2D IP inverison by GeotomoSoftware