Data Processing

Data processing was caried out using a MATLAB script named SiteTran that was developed as part of this thesis. SiteTran required data in the form of two comma separated value (SCV) files named gnss_data and scims_data which contained coordinate data from field work and the SCIMS database respectively. The gnss_data file also included a 'type' field that was used to change which marks were used as TPs in different site transformations.

Using these files SiteTran would carry out the steps shown in the flowchart below to determine the transformation parameters produced from a particular selection of TPs and apply them to all the GNSS coordinate observations. After converting the transformed GNSS data to grid coordinates and AHD the difference between the transformed GNSS and SCIMS values is calculated and displayed to the user.

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