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GENERIC STEP-BY-STEP APPROACH STEP THREE

 Then run the software to develop a catchment profile that will produce accessibility statistics for all
existing service points in the study area.
 Copy the accessibility statistics and store them in an Excel spreadsheet.

Distance tables show the distances between every geographic location (for example, location
of a community) to every other geographic location (for example, location of a service point) along
the movement network, taking the mode of transport and distance or travelling time parameters into
consideration. Table 4 provides an example of a distance table. For instace, the distance between a
particular community (e.g. Origin code = 10) and another community (e.g. Destination code = 100) is 79
137m or 79.1km.

Table 4: An example of a distance table
To develop accessibility maps you need to do the following:

 Export the accessibility statistics generated in the accessibility modelling software into your GIS.

 Then use the GIS mapping generation to develop the accessibility maps.

 You can also overlay other layers of spatial information, for example road network data, on your
maps to produce detailed accessibility maps.

Figure 22 provides an example of an accessibility map. It displays the travel distances from residential
areas to the nearest Home Affairs office within the Johannesburg Metropolitan Municipality without any
constraints on the distance travelled or the capacity of the offices. The measured travel distances are
reflected in kilometres (km) and displayed in a range of colour bands of 5 km increments.

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