Evolutionary models (e.g., genetic algorithms, artificial life), explored in other fields for the past two decades, are now emerging as an important new tool in GIS for a number of reasons. First, they are highly appropriate for modeling geographic phenomena. Secondly, geographical problems are often spatially separate (broken down into local or regional problems) and evolutionary algorithms can exploit this structure. Finally, the ability to store, manipulate, and visualize spatial data has increased to the point that space-time-attribute databases can be easily handled.

The book is an attempt to distill the essence of teaching of Tae Kwon Do as the Art of harmony of mind and body in less than thousand words and twenty principles. None of the principles in this book has been taught inaformal way - they cannot be taught. They revealed themselves through the constant practice. They came from casual conversations and loosely structured commentsas brief and elusive as sparks from a flint edge."