Space Technology and Geographic Information Systems Applications in adb projects

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Figure 2 Global Satellite Mapping of Precipitation
Source: Japan Aerospace Exploration Agency.
basin in the Philippines to provide satellite-based precipitation data and transfer it to the existing flood 
analysis model, and (iv) developing flood warning dissemination and disaster monitoring systems using 
web-based GIS and cellular phones in Bangladesh and Viet Nam. JAXA is collaborating with ADB in this 
project as the implementing agency, supporting project management and providing technical advice.
Contribution of Space Technology and Geographic Information Systems 
GSMaP is an hourly global rainfall map in near real time, available 4 hours after observation with a
0.1 degree (about 10 kilometers [km]) grid over a global area (60N–60S), using the JAXA Global Rainfall 
Watch System. JAXA and the consultant team have been developing methodologies and systems to 
calibrate and validate GSMaP with ground rainfall data in the pilot area of each country. The calibrated 
GSMaP is used as input data for flood models in the target river basin for more effective and efficient 
flood forecasting. These models include the Integrated Flood Analysis System in the Philippines, which 
was developed by the International Centre for Water Hazard and Risk Management, and the Water 
and Energy Budget-Based Distributed Hydrological Model, developed by Professor T. Koike, University
of Tokyo.
High-quality, satellite-based topographical information (digital elevation model [DEM] or digital surface 
model [DSM]) obtained from the Advanced Land Observing Satellite (ALOS) was used to study the 
effectiveness of its use for the local flood model to make an inundation map in the pilot area as an 
alternate source of geographic data to those obtained from spot survey. ALOS imagery and map data 
for the pilot area of the local flood model were used for the background layer of the web-based GIS 
developed under this technical assistance project.
Web-based GIS was also developed for flood warning information sharing in the pilot areas in Bangladesh 
and Viet Nam. 
Results
The project is ongoing and the results of these applications will be available by the end of the project, 
which is planned for December 2014. 

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