Essential to the comprehension of spatial phenomena and application of spatial information, scale dependencies, along with their representations and analyses, must be properly and usefully incorporated for better-informed spatial problem-solving. This book provides a coherent synthesis of past and current research on scale issues in spatial information and analysis. Within a clear geostatistical framework, it describes those fundamental concepts, theories, and techniques essential for scale-dependent and sensitive handling of multi-source spatial data. It includes examples and illustrations for mathematical detail and outlines potential future developments in the field.