Introduction

Google Earth (which can be downloaded here) is a virtual globe, a computer program that intuitively organizes satellite imagery in the form of a three-dimensional model of Earth. Google Earth allows other geo-referenced data to be superimposed on its patchwork of imagery.  While some overlays, known as “layers,” are included in the program’s download, other layers known as KMLs (Keyhole Markup Language) can be obtained from external sources, such as the Google Earth Gallery.  These layers address a wide variety of topics and have thereby broadened the scope of the program’s applications.  One particular area in which Google Earth has demonstrated its utility is in dealing with global crises.  Notably, it has been used in disaster management and armed conflict, as well as to promote support for and awareness of long-term humanitarian causes.