TEDGlobal 2013
Lian Pin Koh: A drone's-eye view of conservation
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Ecologist Lian Pin Koh makes a persuasive case for using drones to protect the world's forests and wildlife. These lightweight autonomous flying vehicles can track animals in their natural habitat, monitor the health of rainforests, even combat crime by detecting poachers via thermal imaging. Added bonus? They're also entirely affordable.
Lian Pin Koh - Drones ecologist
Lian Pin Koh expands conservation efforts by championing the use of low-cost autonomous aerial vehicles. Full bio
Lian Pin Koh expands conservation efforts by championing the use of low-cost autonomous aerial vehicles. Full bio
Double-click the English transcript below to play the video.
00:13
When we think of Nepal,
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we tend to think of the snow-capped mountains
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of the Himalayas,
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the crystal-clear still waters of its alpine lakes,
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or the huge expanse of its grasslands.
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What some of us may not realize
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is that in the Himalayan foothills,
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where the climate is much warmer
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and the landscape much greener,
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there lives a great diversity of wildlife,
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including the one-horned rhinoceros,
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the Asian elephant
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and the Bengal tiger.
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But unfortunately, these animals
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are under constant threat from poachers
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who hunt and kill them for their body parts.
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To stop the killing of these animals,
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battalions of soldiers and rangers
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are sent to protect Nepal's national parks,
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but that is not an easy task,
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because these soldiers have to patrol
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thousands of hectares of forests on foot
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or elephant backs.
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It is also risky for these soldiers
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when they get into gunfights with poachers,
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and therefore Nepal is always looking
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for new ways to help with protecting the forests
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and wildlife.
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Well recently, Nepal acquired a new tool
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in the fight against wildlife crime,
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and these are drones,
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or more specifically, conservation drones.
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For about a year now, my colleagues and I
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have been building drones for Nepal
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and training the park protection personnel
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on the use of these drones.
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Not only does a drone give you
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a bird's-eye view of the landscape,
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but it also allows you to capture detailed,
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high-resolution images of objects on the ground.
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This, for example, is a pair of rhinoceros
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taking a cooling bath on a hot summer day
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in the lowlands of Nepal.
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Now we believe that drones have
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tremendous potential,
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not only for combating wildlife crime,
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but also for monitoring the health
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of these wildlife populations.
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So what is a drone?
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Well, the kind of drone I'm talking about
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is simply a model aircraft
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fitted with an autopilot system,
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and this autopilot unit contains a tiny computer,
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a GPS, a compass, a barometric altimeter
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and a few other sensors.
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Now a drone like this
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is meant to carry a useful payload,
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such as a video camera
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or a photographic camera.
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It also requires a software that allows the user
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to program a mission,
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to tell the drone where to go.
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Now people I talk to are often surprised
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when they hear that these are the only
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four components that make a conservation drone,
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but they are even more surprised
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when I tell them how affordable
these components are.
these components are.
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The facts is, a conservation drone
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doesn't cost very much more than
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a good laptop computer
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or a decent pair of binoculars.
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So now that you've built
your own conservation drone,
your own conservation drone,
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you probably want to go fly it,
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but how does one fly a drone?
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Well, actually, you don't,
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because the drone flies itself.
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All you have to do is to program a mission
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to tell the drone where to fly.
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But you simply do that by clicking on
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a few way points on the Google Maps interface
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using the open-source software.
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Those missions could be as simple
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as just a few way points,
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or they could be slightly longer
and more complicated,
and more complicated,
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to fly along a river system.
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Sometimes, we fly the drone
in a lawnmower-type pattern
in a lawnmower-type pattern
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and take pictures of that area,
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and those pictures can be processed
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to produce a map of that forest.
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Other researchers might want to fly the drone
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along the boundaries of a forest
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to watch out for poachers or people
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who might be trying to enter the forest illegally.
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Now whatever your mission is,
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once you've programmed it,
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you simply upload it to the autopilot system,
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bring your drone to the field,
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and launch it simply by tossing it in the air.
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And often we'll go about this mission
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taking pictures or videos along the way,
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and usually at that point,
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we will go grab ourselves a cup of coffee,
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sit back, and relax for the next few minutes,
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although some of us sit back
and panic for the next few minutes
and panic for the next few minutes
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worrying that the drone will not return.
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Usually it does, and when it does,
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it even lands automatically.
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So what can we do with a conservation drone?
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Well, when we built our first prototype drone,
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our main objective was to fly it over
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a remote rainforest in North Sumatra, Indonesia,
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to look for the nest of a species of great ape
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known as the orangutan.
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The reason we wanted to do that was because
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we needed to know how many individuals
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of this species are still left in that forest.
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Now the traditional method of surveying
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for orangutans is to walk the forest on foot
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carrying heavy equipment
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and to use a pair of binoculars
to look up in the treetops
to look up in the treetops
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where you might find an orangutan or its nest.
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Now as you can imagine,
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that is a very time-consuming, labor-intensive,
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and costly process,
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so we were hoping that drones
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could significantly reduce the cost of surveying
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for orangutan populations in Indonesia
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and elsewhere in Southeast Asia.
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So we were very excited when we captured
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our first pair of orangutan nests on camera.
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And this is it; this is the first ever picture
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of orangutan nests taken with a drone.
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Since then we have taken pictures
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of dozens of these nests
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from around various parts of Southeast Asia,
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and we're now working with computer scientists
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to develop algorithms that can automatically count
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the number of nests from the thousands
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of photos we've collected so far.
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But nests are not the only objects
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these drones can detect.
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This is a wild orangutan
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happily feeding on top of a palm tree,
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seemingly oblivious to our drone
that was flying overhead,
that was flying overhead,
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not once but several times.
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We've also taken pictures of other animals
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including forest buffalos in Gabon,
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elephants, and even turtle nests.
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But besides taking pictures
of just the animals themselves,
of just the animals themselves,
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we also take pictures of the habitats
these animals live in,
these animals live in,
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because we want to keep track
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of the health of these habitats.
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Sometimes, we zoom out a little
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and look at other things that might be happening
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in the landscape.
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This is an oil palm plantation in Sumatra.
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Now oil palm is a major driver of deforestation
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in that part of the world,
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so we wanted to use this new drone technology
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to keep track of the spread of these plantations
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in Southeast Asia.
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But drones could also be used to keep track of
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illegal logging activities.
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This is a recently logged forest,
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again in Sumatra.
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You could even still see the processed
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wooden planks left on the ground.
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But perhaps the most exciting part
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about taking pictures from the air is
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we could later stitch these pictures together
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using special software to create a map
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of the entire landscape, and this map
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gives us crucial information
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for monitoring land use change,
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to let us know where and when
plantations might be expanding,
plantations might be expanding,
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where forests might be contracting,
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or where fires might be breaking out.
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Aerial images could also be processed
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to produce three-dimensional
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computer models of forests.
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Now these models are not just visually appealing,
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but they are also geometrically accurate,
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which means researchers can now measure
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the distance between trees,
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calculate surface area, the volume of vegetation,
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and so on, all of which are important information
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for monitoring the health of these forests.
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Recently, we've also begun experimenting
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with thermal imaging cameras.
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Now these cameras can detect
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heat-emitting objects from the ground,
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and therefore they are very useful
for detecting poachers or their campfires at night.
for detecting poachers or their campfires at night.
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So I've told you quite a lot about
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what conservation drones are,
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how you might operate one of these drones,
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and what a drone could do for you.
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I will now tell you where conservation drones
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are being used around the world.
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We built our first prototype drones in Switzerland.
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We brought a few of these to Indonesia
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for the first few test flights.
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Since then, we've been building drones
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for our collaborators from around the world,
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and these include fellow biologists
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and partners from major conservation organizations.
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Perhaps the best and most rewarding part
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about working with these collaborators
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is the feedback they give us
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on how to improve our drones.
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Building drones for us is
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a constant work in progress.
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We are constantly trying to improve them in terms of
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their range, their ruggedness,
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and the amount of payload they can carry.
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We also work with collaborators
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to discover new ways of using these drones.
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For example, camera traps are a common tool
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used by biologists to take pictures of shy animals
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hiding in the forests,
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but these are motion-activated cameras,
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so they snap a picture every time an animal
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crosses their path.
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But the problem with camera traps
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is that the researcher has to go back to the forest
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every so often to retrieve those images,
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and that takes a lot of time,
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especially if there are dozens
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or hundreds of these cameras placed in the forest.
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Now a drone could be designed to perform the task
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much more efficiently.
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This drone, carrying a special sensor,
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could be flown over the forest
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and remotely download these images
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from wi-fi–enabled cameras.
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Radio collars are another tool
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that's commonly used by biologists.
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Now these collars are put onto animals.
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They transmit a radio signal which allows
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the researcher to track the movements
of these animals across the landscape.
of these animals across the landscape.
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But the traditional way of tracking animals
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is pretty ridiculous,
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because it requires the researcher to be walking
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on the ground carrying a huge
and cumbersome radio antenna,
and cumbersome radio antenna,
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not unlike those old TV antennae we used to have
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on our rooftops. Some of us still do.
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A drone could be used to do the same job
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much more efficiently.
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Why not equip a drone
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with a scanning radio receiver,
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fly that over the forest canopy
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in a certain pattern
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which would allow the user or the operator
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to triangulate the location
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of these radio-collared animals remotely
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without having to step foot in the forest.
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A third and perhaps most exciting way
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of using these drones
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is to fly them to a really remote,
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never-explored-before rainforest
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somewhere hidden in the tropics,
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and parachute down a tiny spy microphone
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that would allow us to eavesdrop on the calls
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of mammals, birds, amphibians,
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the Yeti, the Sasquatch, Bigfoot, whatever.
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That would give us biologists
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a pretty good idea of what animals
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might be living in those forests.
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And finally, I would like to show you
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the latest version of our conservation drone.
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The MAJA drone has a wingspan
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of about two meters.
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It weighs only about two kilograms,
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but it can carry half its weight.
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It is a fully autonomous system.
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During its mission, it can even transmit
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a live video feed back to a ground station laptop,
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which allows the user
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to see what the drone is seeing in real time.
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It carries a variety of sensors,
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and the photo quality of some of these sensors
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can be as high as one to two centimeters per pixel.
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This drone can stay in the air for 40 to 60 minutes,
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which gives it a range of up to 50 kilometers.
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That is quite sufficient for most
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of our conservation applications.
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Now, conservation drones began as
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a crazy idea from two biologists
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who are just deeply passionate
about this technology.
about this technology.
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And we believe, strongly believe,
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that drones can and will be a game changer
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for conservation research and applications.
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We've had our fair share of skeptics and critics
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who thought that we were just
fooling around with toy planes.
fooling around with toy planes.
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And in a way, they are right.
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I mean, let's be honest,
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drones are the ultimate toys for boys.
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But at the same time, we've also gotten to know
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many wonderful colleagues and collaborators
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who share our vision
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and see the potential of conservation drones.
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To us, it is obvious that conservation biologists
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and practitioners should make full use
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of every available tool, including drones,
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in our fight to save the last remaining forests
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and wildlife of this planet.
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Thank you.
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(Applause)
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ABOUT THE SPEAKER
Lian Pin Koh - Drones ecologistLian Pin Koh expands conservation efforts by championing the use of low-cost autonomous aerial vehicles.
Why you should listen
Lian Pin Koh is a relentless tinkerer and science fiction movie geek, though most know him as an environmental scientist. His dreams of combining these interests led him to cofound, with colleague Serge Wich, the site ConservationDrones.org, a project dedicated to gathering intelligence on forests and wildlife through the use of low-cost unmanned flying machines.
Ground surveys are expensive, and are not conducted at a sufficient frequency. Furthermore, some remote tropical forests have never been really surveyed for biodiversity. Koh's machines have already collected valuable information in Sumatra, Congo, Gabon, and Madagascar.
He is an assistant professor of applied ecology and conservation at the ETH Zurich.
Lian Pin Koh | Speaker | TED.com