Conclusion
A few themes have emerged in the course of the book and it is worth finishing by trying to pull these together. The first is the set of problems caused by the 2D nature of spatial data. This is not a problem which is unique to GIS. Computer graphics and computer-aided design (CAD) software also have to handle 2D data, and in fact uses many of the same data structures and algorithms as used in GIS. Where GIS is perhaps different is in the need to handle large volumes of data and to be able to undertake what are effectively database operations. Where specialist software packages are entirely suitable for computer graphics and CAD they present some problems for GIS. For example, specialist GIS software cannot take advantage of the well-tested ...
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