Accessibility and Spatial Structure
Due to different spatial structures, two locations of the
same importance can have different accessibilities. The above figure
illustrates this issue by presenting three cases that compares
the differences in accessibility of two locations according the
variations in the spatial structure.
- (A) Uniform distribution. For a spatial structure where locations are uniformly distributed, locations
1 and 2 have different accessibilities, with location 1 being the most
accessible. As distance (Euclidean) increases, location 1 has access
to a larger number of locations than location 2. To access all locations,
location 2 would require about double the traveled distance
than location 1.
- (B) Clustering in central area. In this case,
which is reflective of the distribution of urban
population, the number of locations that can be reached by location 1 increase rapidly
and then eventually peaks. Location 1 has a clear accessibility
advantage over location 2.
- (C) Clustering in periphery. Although the number of locations that can be
reached from location 2 initially increases faster than for location 1,
it catches up and is actually the most accessible, but by a