GIS Files 1: Getting to grips with GIS

1.3: GIS = software + data . . . a formula for success (2)

GIS evolution

GIS packages have evolved from a combination of two well established types of software: the way in which map geometry is handled is based on graphics and computer-aided-design (CAD) technology; the way in which attribute information is handled has been developed from conventional spreadsheet and database technology.

A professional GIS user must be able to understand the disciplines of both these types of software, as well as appreciating geographic principles.

One of the historical drawbacks to GIS has been the high cost involved. Nowadays reduced costs are making GIS more accessible. The Internet is also playing a big part in increasing the extent to which GIS technology is being utilised. Many web sites use some underlying GIS processing to present customised map images to your browser.

Section 1.4, Different types of GIS data, looks at the different types of information which can be used.

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