URBAN PHOTOGRAMMETRIC DATA-BASE FOR MULTIPURPOSE CADASTRAL-BASED INFORMATION-SYSTEMS - THE RIYADH CITY CASE

Urban information systems are economic resources that can benefit deci sion makers in the planning, development, and management of urban proj ects and resources. In this research, a conceptual model-based prototy pe Urban Geographic Information System (UGIS) is developed. The base m aps used in developing the system and acquiring visual attributes are obtained from aerial photographs. The system is a multi-purpose parcel -based one that can serve many urban applications such as public utili ties, health centres, schools, population estimation, road engineering and maintenance, and many others. A modem region in the capital city of Saudi Arabia is used for the study. The developed model is operatio nal for one urban application (population estimation) and is tested fo r that particular application. The results showed that the system has a satisfactory accuracy and that it may well be promising for other si milar urban applications in countries with similar demographic and soc ial characteristics.