Space Technology and Geographic Information Systems Applications in adb projects

Contribution of Geographic Information Systems
For the site selection for the wind turbines, wind flow modeling was undertaken for the Yap main islands 
and used as the basis for assessing potential wind farm locations. The few ridges with sufficient wind for 
successful turbine operations were subjected to further analysis of constraints including land use, land 
ownership, access, and transmission feasibility. Only the Merry Tower ridge, with its proximity to Colonia, 
the existing electricity grid, and existing road access, was found to be technically feasible and financially 
viable. A DEM was used to delineate the areas in the viewshed of the site. The seen and unseen areas 
from the center of the site were analyzed. 
Results
With the aid of GIS software, the ideal location of wind turbines was realized. The output of analysis 
shows that the south bank of Colonia Harbor is visible from the ridge, but only a small part of the northern 
side. Areas extending toward the airport are all within the viewshed of the ridge. This analysis determined 
the locations for public consultation on visual impact. 

---

28 |
Space Technology and Geographic Information Systems Applications in Asian Development Bank Projects
Energy for All Initiative
Project Title
Energy for All Initiative
Project Number
N/A
Country
Asia and the Pacific region
Department/Division
Regional and Sustainable Development Department/Sustainable Infrastructure Division
Executing Agency
N/A
Sector/Subsector 
Energy
Amount Approved
N/A
Approval/Completion
N/A
Source
http://www.adb.org/sites/default/files/night-skies-electrification-gaps.pdf
ST/GIS Application
GIS analyses for night brightness compared to population density with Satellite nightview