Perpetual Ocean

March 27, 2012 to Mapping • Add Comment • Share on Twitter

Using a computational model called Estimating the Circulation and Climate of the Ocean, Phase II (ECCO2), the NASA Goddard Space Flight Center Scientific Visualization Studio (I think NASA has a thing for long names.) visualizes surface currents around the world. This is beautiful science here. Make sure you turn on high-def and go full screen.

[via @aaronkoblin]

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Robert Dickinson November 9, 2012 at 9:09pm
Robert Dickinson March 28, 2012 at 6:24am

High-resolution maps of science

January 2, 2012 to Network Visualization • Comments (8) • Share on Twitter

While we're on the topic of academic papers and how they're linked, Johan Bollen et. al used clickstream data to draw detailed maps of science, from the point of view of those actually reading the papers. That is, instead of relying on citations, they used log data on how readers request papers, in the form of a billion user interactions on various web portals.

Maps of science derived from citation data visualize the relationships among scholarly publications or disciplines. They are valuable instruments for exploring the structure and evolution of scholarly activity. Much like early world charts, these maps of science provide an overall visual perspective of science as well as a reference system that stimulates further exploration. However, these maps are also significantly biased due to the nature of the citation data from which they are derived: existing citation databases overrepresent the natural sciences; substantial delays typical of journal publication yield insights in science past, not present; and connections between scientific disciplines are tracked in a manner that ignores informal cross-fertilization.

Cross-fertilization. Saucy.

Each circle represents a journal and edges represent connections between journals, according to Johan Bollen et. al's clickstream model. Circles are color-coded by journal classifications from the Getty Research Institute's Art and Architecture Thesaurus.

So you have most of the engineering and physical sciences on the perimeter, medical-related areas to the left, and liberal arts is that middle cluster. Statistics is towards the top left, mixed in with demographics, philosophy, and sociology. There aren't many surprises in the clusters, but there are interesting, albeit weaker, links in the open spaces, such as religion and chemistry or music and ecology.

[PLoS ONE | Thanks, @drewconway]
Robert Dickinson March 28, 2012 at 6:23am

Global forest heights mapped in detail by NASA

July 21, 2010 to Mapping • Comments (4) • Share on Twitter

NASA has mapped the world's forest heights, based on satellite data, for a first-of-its-kind global view. While there are plenty of maps that show forest height regionally and locally, this is the first time it's been mapped globally with a single, uniform method.

The new map shows the world’s tallest forests clustered in the Pacific Northwest of North America and portions of Southeast Asia, while shorter forests are found in broad swaths across northern Canada and Eurasia. The map depicts average height over 5 square kilometers (1.9 square miles) regions), not the maximum heights that any one tree or small patch of trees might attain.

These heights range from 0 to 70 meters. The darker the green the higher the tree canopies.

NASA believes the new map could help scientists with a new perspective on how much carbon forests store and more insight on carbon cycles within ecosystems.

Click through to NASA for the high-res version.

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Perpetual Ocean

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High-resolution maps of science

Global forest heights mapped in detail by NASA