In recent years , some economists have focused on happiness and other measures of subjective well-being that aren 't fully captured by traditional gauges of wealth and income .
The visualization api gives developers the ability to build gadgets , using a set of over 40 different types of visualizations , ranging from interactive bar charts and timelines , to maps and gauges .
His photographs show how decrepit the rail system is , with rotten railway ties , different track gauges and bridges that are still pockmarked by bullets from the korean war .