For the purposes of this research report, a simple accessibility assessment was carried out using version 18.104.22.168 of the Accession software (2008). The current version of the software is version 1.6.2 (November 2012).
A basic road network was created using a 3x3 matrix roughly the same size as Christchurch city. This was done so the testing methodology could be compared to the calculations undertaken in section 12.4 where basic accessibility calculations are undertaken on a citywide basis in Christchurch. The 3x3 matrix overlaid on the Christchurch city road centreline GIS layer is shown in figure A.3.
Figure A.3 Basic 3(6km) x 3(6km) matrix (32.4Ha)
The matrix was then populated with sample origins at each of the intersecting nodes and sample destinations randomly clustered within each of the matrix cells and around each origin (shown in figure A.4). All testing was performed on this very simplistic network. Each of the matrix cells is titled with a letter for later reference.
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Figure A.4 Network connectivity