The yellow square is 30 meters on a side, exactly the size of a single pixel of Landsat data and slightly larger than a baseball diamond. The aerial photograph on the right shows Target Field in Minneapolis. The Landsat data on the left shows healthy vegetation in green while streets and buildings range from reddish-brown to white. Landsat’s spatial resolution of 30 meters allows us to see the landscape at a human scale while simultaneously collecting data across a broad swath 185 kilometers (or 115 miles) wide.
See more:
+ Zoom into Target Field with Landsat [flickr]

STELLA: A DIY Handheld Scientific Instrument
If you are looking for a do-it-yourself (DIY) handheld spectrometer, you need to meet STELLA. STELLA (Science and Technology Education for Land/Life Assessment) is a portable scientific instrument developed by