One of the key geographical developments over the last two centuries has been that of urbanisation. In recent years this has exploded globally, particularly in developing countries. It is essential for governments, planners and researchers in geography and allied fields to understand this process and the main way of being able to do this is to accurately map these changes. The main method of this mapping is Remote Sensing. This up-to-date analysis of the area looks at a wide range of methodologies currently being used to produce and analyse remotely sensed data of urban areas. The authors examine the various techniques used to extract information from digital, multispectral images of urban areas. Donnay and Barnsley then go on to look at the identification of urban forms, the delineation of agglomerations and the development of urban morphology, considering the analysis of integrated data sets and surface models and going on to look at the estimation of human population levels.

Mangroves are salt-adapted plants that are found along many of the world's tropical and sub-tropical coastlines. Regrettably, these plants are being lost due to over-exploitation, pollution, conversion to agriculture and aquaculture and other causes. This is having important consequences for local human populations that traditionally rely on this resource, and is upsetting the fine balance needed to maintain this highly productive ecosystem. This text brings together some papers from two recent international symposia on the mangrove ecosystem. It provides an outline of future directions in mangrove research considered to be urgent by prominent mangrove scientists. Contributions include aspects of population differentiation in mangrove species that have been very little studied so far, ecological function, and restoration and management of the mangrove ecosystem. This book is intended for scientists actively working in the areas of mangrove ecology and management.