Continuous Improvement of the NOAH Initiative through the Use of Free and Open Source Software — Ivan Lester Saddi, Jobyn Marmol, Eric Jay dela Peña As a means of mitigating risks in a hazard-prone archipelago, the Philippine government through the Department of Science and Technology launched the Nationwide Operational Assessment of Hazards (DOST Project NOAH) on July 2012. This program aims to integrate various research and technology development efforts in improving flood, landslide and storm surge hazard maps and in instituting effective early warning systems for these hazards. These initiatives produced various geospatial datasets relating to hydrometerological hazards such as satellite imageries, LiDAR maps, Doppler radars, localized weather forecasting models and a vast nationwide network of automated weather and water level sensors. With such wealth of datasets, these information are processed and visualized through a near real-time web-based spatial data infrastructure. The NOAH website (noah.dost.gov.ph) serves as a information and communication platform for government agencies, rescue and disaster-related organizations and the general public to effectively prepare for impending hazards. Designed to be a web geographic information system, the NOAH website now uses Geoserver and OpenLayers API to handle, process, analyze hazard maps, and exposure and vulnerability datasets. Since the launch of the portal, thousands of lives had been saved from the dangers during the annual monsoon events since 2012, Supertyphoon Bopha in 2013 and in typhoons Rammasun and Hagupit in 2014.