Why using Geographical Information Systems (GIS)?
For the purpose of this study, the following advantages of using a GIS proved to be most useful: • Visualisation of spatial data, particularly the distribution of agricultural open spaces in a city • Simple analytical functions such as calculation of the sizes of agricultural areas • Possibility for data overlay in order to investigate relations with various relevant factors, e.g. designated land use, irrigation water quality, socioeconomic variables etc. • Potential for updating digital maps in the future, and extension to a greater range of topics and layers • Possibility to print hardcopies of maps showing any desired selection of topics and areas in any scale, for discussions with stakeholders • Linkage of vector data in maps with attribute data such as type of crops grown or number of farmers • High flexibility: According to the respective local contexts and available data sources, a wide variety of spatial data can be integrated and combined for optimal outcome: Satellite imagery
