Close

Search

Search Menu
Photonics Media Photonics Buyers' Guide Photonics EDU Photonics Spectra BioPhotonics EuroPhotonics Industrial Photonics Photonics Showcase Photonics ProdSpec Photonics Handbook
More News
SPECIAL ANNOUNCEMENT
2016 Photonics Buyers' Guide Clearance! – Use Coupon Code FC16 to save 60%!
share
Email Facebook Twitter Google+ LinkedIn Comments

Multispectral Images Expose City Dynamics

Photonics Spectra
Jul 2001
Using data from the Advanced Spaceborne Thermal Emission and Reflection Radiometer aboard NASA's Terra satellite, geologists at Arizona State University in Tempe are learning why cities form the way they do. An analysis of 12 cities from nine countries already has revealed that there are three classes of cities -- decentralized, centralized and intermediate -- determined by density, growth pattern, and presence or absence of an urban center.

The instrument aboard Terra produces images at 14 wavelengths extending from the visible through the infrared, and it has a resolution of 15 to 90 m2 per pixel. The researchers hope that a study of 100 cities worldwide will define issues in urban ecology, including the influence of geography and social factors on city dynamics.


Comments
Terms & Conditions Privacy Policy About Us Contact Us
back to top

Facebook Twitter Instagram LinkedIn YouTube RSS
©2016 Photonics Media
x Subscribe to Photonics Spectra magazine - FREE!