The method for environmental evaluation which has been described results in the identification of areas which are broadly suitable for development and areas which are suitable for development subject to certain conditions. The comparison of the visual character of traditional settlements in many tropical areas with the visual character of recent developments often emphasises the importance of recognising the potential of existing landscape elements. The complexity of a natural landscape can be simplified and summarised in describing systematically its geology, land form, climate, hydrology, soils, fauna and vegetation. The ‘appropriateness’ of development to the area, its terrain, climate and vegetation is far more important than a conscious effort to design for visual character. Flood-prone areas are identified partly by survey and contour interpretation using known flood levels, partly by vegetation indicators and partly by calculation. Some areas selected for urban development will have some constraints which make density restrictions or performance controls necessary.