Publishing Details

Tool Type: 
Publication Year: 
HarvestChoice/International Food Policy Research Institute (IFPRI)
Years Covered: 
Primary Contact: 
Jawoo Koo
Lowest Geographic Unit: 
Trial sites


This tool shows the location of CGIAR variety trial sites on Google Maps, and overlays a layer indicating the climatic similarity (in terms of rainfall and temperature regimes) over space from the user-selected trial site.

This information can be useful to assess the varietal spill-over potential (i.e., transferability of germplasm from the tested site to other areas) at regional scale. CIAT’s Homologue tool was used to generate the similarity layers.


HarvestChoice, 2009. "Trial Site Comparison (Homologue)." International Food Policy Research Institute, Washington, DC., and University of Minnesota, St. Paul, MN. Available online at

Additional Attributes

Data Sources/Credits:

Glenn Hyman (CIAT) 2009

Keywords: Africa, Climate, DROPPR, Rainfall, Sub-Saharan Africa, Temperature, Weather
Geographic Coverage: Angola, Burundi, West Africa, Botswana, Burkina Faso, Congo DR, Malawi, Ethiopia, Kenya, Mozambique, Madagascar, Rwanda, South Africa, Ghana, Zimbabwe, Sudan, Tanzania, Uganda, Mali, Niger, Nigeria, Senegal, East & Central Africa, Southern Africa
Format/Platform: Droppr (MySQL, PHP, GoogleMap API, JavaScript)