Apart from drought vulnerability, where the data often need to be presented at a regional or global level, the most useful geospatial information should be on much smaller scales and at high resolution. Flood risk maps, and urban classification for earthquake risk mapping, for example, should be on scales of 1:2,000 to 1:10,000, with a spatial resolution of one to five metres per pixel.34 Landslide hazard assessment mapping can be at a 1:50,000 scale, with a spatial resolution of 10 metres. Another issue is the frequency of updates which in both these cases might be every five years.