Expanding 3DEP Coverage

Five years after the United States Geological Survey launched its 3D Elevation Program, it has delivered the first ever national baseline of consistent high-resolution elevation data. As the program matures and works toward its goal of covering 100 percent of the U.S. and its territories, it faces challenges and opportunities in the West.  Click below to read the article.


The Commuting Principle That Shaped Urban History

For many people, commuting to work is an almost ubiquitous daily occurrence that most strive to keep to a reasonable length.  But is this a uniquely modern difficulty, or did workers in past eras have similar commuter struggles?  That question is the focus of a CityLab article, which opens by introducing what is known as the Marchetti Constant, an idea coined by the Italian physicist Cesare Marchetti, which basically describes that people have always been willing to commute for about a half-hour, one way, from their homes each day.  The average speed of our transportation technologies does more than anything to shape the physical structure of our cities.  This article, which includes several illustrative maps and images, offers you a quick overview of the history of transportation and urban development.  Check it out!