The New York City-based Foundation Center has announced the launch of a data visualization tool to help grantmakers, policy makers, researchers, and others better understand the impact of philanthropy around the world. Philanthropy In/Sight allows registered users to create customized Google maps to explore giving patterns, emerging trends, and funding relationships globally, nationally, or at the community level. Updated weekly, the center’s data on some 97,000 grantmakers and more than 1.6 million grants can be combined with dozens of demographic and socioeconomic data overlays to create mashups that help users understand where foundation dollars are having the greatest effect and where funding is most needed.