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COMMON TERMS
Accessibility study:
Accessibility modelling:
Cartesian coordinate system:
Catchment area:
Catchment area analysis:
Catchment profile:
Constrained catchment
area analysis:
Coordinate system:
1
A study that assesses the provisioning and geographic location of
service points in relation to where people live and the distances that
they travel to access the services that are provided.
Geographic analysis which takes into account the combined
effects of various factors in determining the optimal size, number
and location of facilities to meet the demand of the population
within reach of them. It can be used to generate accessibility
statistics.
A system that uses a set of numerical coordinates to locate a
point on a map or graph.
The geographic area that is served by an institution or service
delivery facility. The size and shape of a catchment area will
depend on how accessible a facility is and how far it is from
alternative facilities.
The methods used to determine the service areas
that are covered by existing service points.
The demographic and other characteristics of the population
that are within the geographic reach of service points.
Catchment area analysis in which travel distance standards area
analysis and population capacity thresholds of facilities are taken
into consideration in determining the optimum provisioning of
service points.
A system that uses numerical values to establish the position of
a point in space. A common example is the system of assigning
longitude, latitude and elevation to a point on the earth’s surface.