Flood Mapping With Satellite Images and Its Web Service
The value and usefulness of timely collected and processed satellite images are demonstrated through the mapping activities in recent floods in Indiana and Georgia. In addition to the free Landsat images, which have limitations in timely revisits and cloud cover requirements, the other images, such as radar images, from the International Charter are a valuable data source. Archived images and GIS data are needed to detect reliable flood extent and estimate potential crop and infrastructure damages. The combined use of temporal optical and radar images is often necessary to achieve this objective. Web mapping capability provides the general public and government agencies with an effective tool for situation awareness and development update.