Understanding the Drivers and Consequences of Global Urbanization using Emerging Remote Sensing Technologies

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Photo showing a bunch of hands holding up the earth. Photo: Gandee Vasan/Getty Images

urban growth workshops at Arizona State University logoIs urban remote sensing really useful to local planners? Does the research community understand which applications, scales and data are most relevant and sought after? These and other questions were addressed in a recent workshop organized by the Geography Department at the Arizona State University.

Mapping Aquatic Vegetation on Lake Victoria

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Moderate Resolution Imaging Spectroradiometer (MODIS) imagery depicting Lake Victoria normalized difference vegetation index (NDVI) extraction before (left) and after (right). The left shows an unprocessed satellite image, while the NDVI image is shown on the right, depicting aquatic vegetation in green. Bright green areas indicate dense aquatic vegetation. Source: USGS.Invasive aquatic vegetation has been a serious issue in Lake Victoria over the past decade, hindering transportation as well as a profitable fishing industry. Remote sensing was used to map the spatial extent of aquatic vegetation on the surface of Lake Victoria as well as create time series animations to show growth and movement of the vegetation. Our results will be used by SERVIR and the Lake Victoria Fisheries Organization to conduct operational satellite-based surveillance and to protect local fisheries.

CBERS: a Chinese-Brazilian Collaboration

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Photo showing a bunch of hands holding up the earth. Photo: Gandee Vasan/Getty Images

Image of Brasilia, as seen from the CBERS-2 satelliteWhat do you do if you’re home to some of the world’s most significant natural resources, but you don’t have the technology to place satellites in orbit? In Brazil’s case, the answer is a long-lived collaboration with China called CBERS (China-Brazil Earth Resources Satellite), which started in 1988 and is still going strong. Today, Brazil has the ability to launch its own satellites, but the two nations continue their partnership.