While people often say that borders aren’t visible from space, the line between Kazakhstan and China could not be more clear in this satellite image. Acquired by the Landsat 8 satellite on September 9, 2013, the image shows northwestern China around the city of Qoqek and far eastern Kazakhstan near Lake Balqash.
The border between the two countries is defined by land-use policies. In China, land use is intense. Only 11.62 percent of China’s land is arable. Pressed by a need to produce food for more than 1.3 billion people, land that can be sustain agriculture is farmed intensely. Fields are dark green in contrast to the surrounding arid landscape, a sign that the agriculture is irrigated. As of 2006, about 65 percent of China’s fresh water goes to agriculture, irrigating 629,380 square kilometers (243,300 square miles) of farmland (an area slightly smaller than the state of Texas).
On October 26th, a hole was blasted in the base of 125' tall Condit Dam on the White Salmon River in Washington. In less than 2 hours, the reservoir behind the dam drained completely and the White Salmon flowed unimpeded by a dam for the first time in 100 years.
This short clip is a combination of video and timelapse photography captured throughout the day.
"This cool new historic mapping app from the folks at esri and the U.S. Geological Survey is worth exploring. What it does is take 100 years of USGS maps and lets you overlay them for just about any location in the nation. That allows users to see how a city – say Harrisburg – developed between 1895 and today. The library behind the project includes more than 178,000 maps dating from 1884 to 2006."