Integrating of Microwave Remote Sensing and WebGIS in Flooding Detection and Web-mapping

SUMMARY Flood usually happens in Vietnam. To detect flooding areas after storms, there were some methods, among them remote sensing is one of the solution for reducing budget and field works. There are various of remote sensing data with different resolutions which is including aerial photos, satellite images... Recently the invention of Radar satellite is the great step in remote sensing technology, it overcame the disadvantages of optical images that is bad weather influence. The research used Envisat ASAR multi temporal to detect the flooding area rapidly. Beside that, in order to publish the results on internet, the research utilized free open sources WEBGIS software Mapserver to web-mapping. A flowchart of image processing and data publishing was proposed. It is the gathering of Radar image processing by BEST software, image processing by ERDAS IMAGINE and MapServer - Maplab for data publishing. The experimental areas were Daklak-Daknong provinces where had food in August 2007. The result proved that using Envisat ASAR for inundation detection is suitable to Vietnam condition. In addition utilization of open sources GIS and remote sensing software helps the researcher in fund saving.