What we see here is Vancouver, a combination of tree height data, Landsat vegetation data and information from the affordable housing district, showing the blue dots right now. What we can start to identify is patterns, things that we can see about the city that affect the way that people live in it. You can tell that the areas that have a lot of trees protect us against heat. This is heat data showing the density of trees. And when we pan over to really forested parts of the city, we can tell that the trees are actually protecting us from that heat. So what we've identified is really two patterns here. One, that trees are great for economic development. People really desire living in places with trees. And two, that trees are critical for building a lovely, wonderful city.我们现在看到的是温哥华，这幅图结合了树木高度数据、Landsat卫星植被数据以及可负担住房区的信息，目前以蓝点显示。通过这些数据，我们开始能够识别出一些模式，也就是那些会影响人们生活方式的城市要素。你可以看出，树木密集的区域能够有效抵御热量。这张图是关于热能的数据，用来展示树木的密度。当我们把视角转向城市中森林密集的地段，就可以清楚地看到，树木确实在帮助我们抵御热浪。所以我们识别出两个关键的模式：第一，树木对经济发展有益，人们更倾向于住在有树的地方；第二，树木对建设一个宜人、美好的城市至关重要。

But it's not enough to have a static map, looking at the past. Our goal is to have a really dynamic map that’s updating in real-time. And in the background, dozens of satellites are orbiting the Earth, taking images of Vancouver, so that we can start to move from mapping to monitoring to building an instrument panel and a dashboard where we can really understand what’s happening in our city in real-time. This lets us move away from thinking about individual projects towards thinking about the city as a cohesive whole. An integrated system where all of the projects play together to achieve multidimensional goals.但仅仅拥有一张静态的、用于回顾过去的地图是不够的。我们的目标是创建一张真正动态的地图，能够实时更新。在地图的背后，有数十颗卫星围绕地球运行，拍摄温哥华的图像，使我们能够从“制图”迈向“监测”，再迈向构建一个真正的“操作面板”和“控制仪表板”，用以实时理解我们的城市发生了什么。这种方式让我们从只关注个别项目，转向将城市作为一个整体来思考——一个项目协同运行、共同实现多维目标的集成系统。

So here we have all of the building permits in Vancouver right now. But that doesn't really tell us what's actually happening on the ground. If we use satellite imagery, we can run change detection algorithms and actually see the places where change is really happening, where ground is being broken. Zooming into one of those, we can see the actual development that's occurring in Vancouver. We can see a satellite image of a construction site. Moving back in time and turning the trees red with infrared sensors, we can really see trees blossoming and growing, the vegetation changing over time. And we can see that this particular one small development in Vancouver cut down a bunch of trees, which is very natural. But in order to have our goal of having a more forested city, we're going to have to plant these trees somewhere else, probably north, in that affordablehousingdistrict that we saw earlier. This is what I mean by using maps to build. We get a dashboard and an instrument panel for understanding the change in the globe over time, not just in terms of thespatialinformation, but in terms of a time series, in terms of metrics and measures that we can use to guide development.现在我们看到的是温哥华所有的建筑许可数据。但这些数据并不能真正告诉我们地面上实际发生了什么。如果我们利用卫星图像，就可以运行变化检测算法，真正识别出那些正在发生变化、土地正在被动工的地方。放大其中一个区域，我们可以看到温哥华某地的实际建设情况，图中是一个建筑工地的卫星图像。通过时间回溯功能，并用红外传感器将树木标红，我们可以看到树木的开花、生长过程，以及植被随时间的变化。我们还可以发现，在温哥华这个小型建设项目中，砍掉了不少树木，这是非常自然的现象。但如果我们想实现“让城市更绿”的目标，我们就需要在别处补种这些树木，很可能是在之前提到的北边的可负担住房区。这就是我所说的“用地图来建设”：我们拥有一个可以监测全球变化的仪表盘，不只是空间上的信息，更是时间序列的数据，以及可用于引导城市发展的一系列指标与度量。

For the last 50 years, we've really framed the question we have as a society very narrowly: to build or not to build. But the important thing about technology is that it eliminates trade-offs. It lets you do more with less. This living globe, it's not just a mirror for the world, it's also a canvas to build a better future, to visualize it, and then to summon the collective will to make it happen.过去的50年里，我们整个社会一直把问题框定得过于狭窄：建还是不建。但技术的真正意义在于，它能消除这种二选一的权衡，它让你用更少的资源做更多的事情。这个“活地球”不仅仅是世界的一面镜子，它更像是一块画布，供我们描绘更美好的未来，设想它，并激发集体意志去将它变为现实。

I'm really excited to be here and share this with you.

我非常激动能在这里与你们分享这一切。