QC CalcGIS - Pack of Offline Geodetic and Acoustic Survey Utilities

Geodetic Utilities

There are several Geodetic utilities to perform coordinate conversions, datum shift and range/bearing computation. Determine a 3 parameters datum shift from a known point. Compute convergence, scale factor and plot coordinates on charts using GIS or CAD background layers.

Acoustic Operations Utilities

USBL and Network adjustment routines are provided to compute correction factors and provide QC for USBL data provided by contractors. Network adjustment facility to compute errors and adjustments in a multi-base/transponder array to provide best fit solutions and error statistics.

Both are backed up by Velocity of Sound profile entry, computation using different formulae to suit conditions.

Planning & QC

Use the various routines to plan or QC a project, coordinates can be saved and overplotted as lines or points on a background chart. The chart can import GIS layers such as .SHP and also .DXF, .DGN and GeoTIF files to allow data to be displayed in different formats and coordinate systems.


A serial GPS interface is provided so that a defined vessel shape can be shown on the display.


A Catenary calulator is included to allow marine operators to compute touchdown distances or clearances of mooring lines for barges, semi-sub rigs or FPSOs.

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Click the button here to download a PDF spec sheet for the product, for more information use the Support page.

Click the button here to download a copy of QCCalc, this will run in Trial mode for 7 days after which you can contact ILEX to purchase a licence. Current price is £300 (+ VAT for UK customers)

ILEX Computing Ltd. was established in 1989 and focusses on the Offshore Oil & Gas and Renewables Industries
We specialise in real-time applications where accuracy and response are key application considerations. Our software is used in harsh offshore environments for critical operations in monitoring, inspection and diving operations. On-line acquisition through data processing and reporting provides our clients with appropriate KPI and management tools.