World Wind Tools Reveal Environmental Change
- Saturday, 01 January 2011
“Who has more satellite data than NASA?” asks Patrick Hogan.
The question is a rhetorical one. After dozens of Earth-observing satellite launches and missions to other planets, NASA has accumulated an unmatched amount of planetary science information, including satellite imagery, terrain information, and climate data. To visualize this data and make it accessible, in 2002 Hogan and his colleagues at Ames Research Center started building a software program called World Wind.
Originally developed under NASA’s Learning Technologies program as a tool to engage and inspire students, World Wind aspired to help NASA move 3D visualization of NASA data into the classroom, using videogame-like virtual globes of Earth, Moon, Venus, Mars, and Jupiter.
In 2005, shortly after the release of World Wind, the U.S. Department of Energy (DOE) was impressed by the technology at a geographic information systems (GIS) conference. “At the time, World Wind was an Internet application, specific to the Windows platform. DOE wanted something cross-platform,” says Hogan, World Wind project manager at Ames.
With support from DOE, Hogan and his team designed World Wind to be a technology that others could simply plug into their application, rather than an application that required others to plug into it. This redesign is the World Wind Java Software Development Kit (SDK) and the Web Mapping Services (WMS) Server. Currently, there are over a million requests for World Wind data each day.
Released under the NASA Open Source Agreement (NOSA) license, anyone is permitted to use World Wind for their purposes, with one caveat: According to the license, if a user changes the SDK or WMS Server, the code changes fall under the NOSA and need to be made open and available.
Hogan describes World Wind as enabling government, commercial enterprise, and individual developers to focus on their needs, without having to “recreate the wheel” for 3D visualization. “We’re providing the essential infrastructure for spatial data so others can make their data come alive in a virtual world. This allows those people to concentrate on information intelligence and data analysis. We make it possible to see the information in its native concept of the real world.” As a testament to the software’s success, World Wind was awarded the prestigious NASA “Software of the Year” for 2009.
One of the companies currently making use of the NASA technology is Honolulu, Hawaii-based Intelesense Technologies (Spinoff 2007). Started by Stanford University and former NASA engineers to provide global monitoring services, today the company uses the technology for environmental, public health, and other monitoring applications for nonprofit organizations and government agencies.
Intelesense develops wireless sensor networks that support its three integrated global monitoring products and services: InteleCell, a dedicated data acquisition platform that communicates data from the sensors through the Internet; InteleNet, a real-time distributed mesh network that integrates data from different sources; and InteleView, a secure GIS-based 3D visualizer based on NASA’s World Wind.
According to Kevin Montgomery, the chief executive officer of Intelesense, by not having to develop a technology like NASA’s World Wind, the company has saved approximately $1 million in costs. After adopting World Wind 4 years ago, the company significantly enhanced the technology. “We’ve added security features like authentication, advanced visualization features, and linked it to our server cluster that has hundreds of thousands of layers and other capabilities,” says Montgomery. Some of the applications for Intelesense’s system include monitoring climate change, air quality, security, and public health.