Google Powers Up Its 'Earth Engine' with Eye on Saving the Amazon

Technology Allows Scientists to Analyze Satellite Imagery in Time to Act

Google is putting a new spin on its global mapping program, with a goal of not just peering into locations around the world but also carefully tracking environmental changes that are under way.

For a few years now, NGOs and environmental groups have been using the satellite imagery available in Google Earth to get their point across. The nonprofit group Appalachian Voices, for example, uses the tool to show the world what mountaintop removal mining has done to their homeland. Defenders of forests throughout the country have also used Google Earth to reveal illegal logging practices.

Now, the tool is poised to become an integral component of the United Nations' Reducing Emissions from Deforestation and Forest Degradation in Developing Countries (REDD) program.

In broad strokes, REDD allows wealthy countries to pay developing countries to not cut down their trees, by placing a value on the carbon dioxide that those trees sequester and on the host of other environmental services active forests provide, such as wildlife habitats.

It has been a contentious program for a variety of reasons. Indigenous rights groups like Survival International are concerned that making the forests valuable could lead to practices that place forest protection in front of indigenous rights; policy writers worry that REDD will give countries an easy way around legislating carbon emissions; and environmentalists fret that there's no way to really double-check whether a forest is or isn't being protected, and that many of the forests covered by REDD were not in any danger of being cut to begin with, rendering moot the emissions reductions gained by protecting them.

Google Earth can't resolve all of those issues, but it can fix the monitoring problem, and it can go one step further and improve scientists' understanding of forests and other ecosystems.

At the Copenhagen climate summit late last year, Google unveiled a prototype tool that would allow scientists to run algorithms against the copious amounts of historical and real-time satellite data collected by Google Earth. While that might just sound like just some fancy new web app, it is in fact a game-changer.

"Scientists in Brazil said to us, 'We can't monitor the Amazon effectively with our own resources,'" says Rebecca Moore, creator of Google Earth Outreach, a program that exists to help NGOs, indigenous groups and environmentalists figure out how to use Google Earth to their benefit.

"The amount of satellite data that exists about the Amazon — it's billions of gigabytes — and the science exists to extract meaningful information about forest loss or gain from satellite imagery, but scientists haven't been able to do that at scale, because just to run one simple change-detecting algorithm over the entire Amazon takes weeks or months."

Moore says the Brazilian scientists she met in 2008 when she and her team were in the country to present the Portuguese version of Google Earth (and to work with groups who could get the tool to the Amazon's indigenous tribes) asked if Google would build a platform that could host satellite images for the Amazon, and ideally all forests and ecosystems, and provide access to cloud computing resources.

"That was intriguing to us — we already have the satellite imagery, but we only make it available for viewing, and they were asking us to make it available for analysis so that they could not only see deforestation, but measure it," Moore says.

The company's nonprofit arm, Google.org, sponsored a prototype, built with data from Brazil, Peru and a few other countries, and demonstrated it at Copenhagen.

"We found that an algorithm that could take months to do on a desktop could be done in seconds using this tool," Moore says. "It changes the game completely."

One of the Brazilian scientists Moore had initially spoken with, Carlos Souza, has used the new tool to build an alert system linked to deforestation. He gets daily satellite imagery and uses an algorithm to determine where there are currently hot spots of suspicious activity. The software then generates an alert, which could be used to mobilize people on the ground in that area, in real time, to prevent further deforestation.

"A significant amount of logging in the Amazon is illegal, but people don't find out until it's too late, and then it's all over," Moore says. "But if you had a system in place that detected change every day and then could mobilize local NGOs or Greenpeace, for example, they could potentially intervene and stop it from going any further."


The New Tool: Google Earth Engine

Called Google Earth Engine, the new tool will roll out completely by the next international climate conference planned for Mexico later this year.

In addition to the various algorithms that scientists will be able to create and use in the system, Moore says she expects REDD auditors, policy makers and journalists to be using the tool as well. REDD requires that those receiving compensation for reducing deforestation produce open, transparent and independently verifiable reports on what they are doing.

"Obviously, they're not going to be able to send an auditor to every forest in the world, that's just not feasible," Moore points out. "But with Google Earth Engine, because all the data is in the cloud, and analysis too, it can keep track of what analysis was run, what the parameters of that analysis were, and how they got to their results — all of that will be thoroughly auditable."

In other words, REDD recipients will be able to use the engine to produce reports, and REDD auditors will be able to use it to audit those reports.

As her role as head of Google Earth Outreach suggests, Moore is a passionate advocate of Google Earth's potential to bring environmental and social benefits. It's a passion, she says, that stems from her own personal experiences using Google Earth images to save a redwood grove in the Los Gatos Creek Watershed, near Santa Cruz, Calif.

"These developers were trying to say that they weren't cutting down trees, and I was able to use Google Earth to show that they were, which went a long way toward helping us win that fight," she told the audience at the recent Turning the Tide conference in Marin, Calif.

Now, Moore hopes the tool will help to save many more forests, as well as other ecosystems.

"The way my team is building this platform, it's intended to be a catalogue of all the world's observation data about Earth, and that includes all the satellite data, sea surface temperatures, weather data, soil information, all of that," she says.

"It's not just limited to forests and land cover. We're looking at water, too, and the next big thing we're focusing on is water and resource modeling. If you can have a system at scale that can predict where there will be water scarcity issues, or food scarcity issues, and you can have in place, say, an early warning system, that is huge."

Moore is quick to point out that Google will be providing the data and the tools necessary for analysis, but it will not be performing any analysis itself. And while Google Earth Engine will be available to the public, not everyone who uses it will opt to make their findings publicly available.


Bringing Internet Access to the Amazon

Clearly, making the tool widely available also relies on making Internet access widely available.

"When I was talking with many of the rainforest nations — for example, the minister of the environment for an African country — they would say, this is great but we can't do this analysis in our country, our computers are 12 years old, and we'd love to just point our browser to this portal in the sky, but then the question becomes Internet access," Moore says.

High speed cable is making its way down both coasts of Africa, she said, and the Brazilian government's "digital inclusion" policy is working to bring satellite Internet to some Amazon tribes and the slums of Rio.

Much more still needs to be done to ensure that as many people have access to the system as possible. Nonetheless, Moore suspects that the engine will bring to light new information about the planet.

"Never has all of the information about the Earth been in one place, in one system, and made available for analysis and interpretation," she says. "I think we're going to learn things about the Earth that are fundamental new discoveries."

 

See also:

Millions of Acres of Southern Forest Lost to Mining and Asphalt

Putting a Value on Preserving Forests, Not Clearing Them

Seeing the Forest for the Trees: Shaping Financing to Prevent Deforestation

 

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