4.2.2 Relief (after the Flood)
In this stage, re-building destroyed or damaged facilities and adjustments of the existing infrastructure will
occur. At the same time, insurance companies require up-to-date information to settle claims. The time factor
is not as critical as in the last stage. Nevertheless, both medium and high-resolution remote sensing images,
together with an operational geographic information system, can help to plan many tasks. The medium
resolution data can establish the extent of the flood damages and can be used to establish new flood
boundaries. They can also locate landslides and pollution due to discharge and sediments. High-resolution
data are suitable for pinpointing locations and the degree of damages. They can also be used as reference
maps to rebuild bridges, washed-out roads, homes and facilities (Jeyaseelan, 1999).