Archive for the ‘Uncategorized’ Category

Odds & Ends: Batu Tara Volcano Emits a Wispy Plume

June 26th, 2012 by Robert Simmon

Active since 2006, Batu Tara continues to puff away. A thin volcanic plume streams northwest from the cloud-shrouded volcano. The Advanced Land Imager (ALI) aboard the Earth Observing-1 (EO-1) satellite collected this natural-color image on June 21, 2012.

NASA image By Jesse Allen and Robert Simmon using EO-1 ALI data.

Tree Biomass Map Featured on Co.DESIGN

February 28th, 2012 by Robert Simmon

Last month it was Science Friday, this month it’s Co.DESIGN: NASA Creates Insanely High-Res Map Of America’s Trees, And Offers A Lesson In Information Design. Tim Maly describes our map of tree biomass in the U.S. (based on an exquisite data set from Woods Hole Research Center), and lets me rant a bit about color palettes and data visualization.

Science Friday Explains the Blue Marble

February 7th, 2012 by Robert Simmon

Last week, Flora Lichtman of Science Friday put together a short video about the views of Earth NASA has produced over the years. She began with the famous Earthrise photo taken by the crew of Apollo 8, then interviewed me and NASA scientist Gene Feldman. We discussed the differences between photographs and data visualizations, and the craftsmanship that went into the 2002 Blue Marble. There’s even an audio clip from the late Carl Sagan, describing the Pale Blue Dot image from Voyager 1. All spurred by global imagery from the new Suomi NPP satellite.

AGU Fall Meeting, 2011

December 2nd, 2011 by Robert Simmon

Along with half the Earth scientists at NASA, I’ll be at the American Geophysical Union Fall Meeting next week. If you’re interested in getting together to talk scientific visualization, drop a note in the comments, or stop by my poster: Methods to Enhance Climate Change Imagery for Communication (5 MB PDF). It’s got a few before/after examples of imagery from NASA press releases and the IPCC showing a better way of presenting the information (in my opinion).

U11B: Effectively Communicating Climate Science (How to Address Related Issues)
December 5, 2011
8:00 a.m.–12:20 p.m. (good thing I’ll still be on East Coast time).
Halls A-C (Moscone South)

Here’s more info on the session, and the oral presentation in the afternoon.

I’ll also be at Communicating Your Science: Panel and Workshops on Sunday, and at the social media soiree Mondy evening (6:00–8:00 p.m. InterContinental Ballroom C). Hope to see you there!

A Muddy Chesapeake Bay

September 16th, 2011 by Robert Simmon

Callan Bentley of Mountain Beltway posted a photo of the Chesapeake that’s a nice complement to the view from space we published last night. I live in the Anacostia River watershed, which feeds into the Chesapeake, and all the nearby streams have been brown since Hurricane Irene hit three weeks ago. The Bay is probably going to be muddy for a while.

You can see how things progress with twice-daily satellite views of the Bay via the image “subset” centered on the Chesapeake Lighthouse. Unfortunately, it’s been cloudy the past few days, but there’s a chance there will be a clear shot by early next week—the forecast for Monday is “mostly sunny.”

Odds and Ends: Nabro Volcano and Texas Wildifres

September 15th, 2011 by Robert Simmon

 

Two more images that don’t quite fit on the main site: Nabro Volcano and the Riley Road Fire near Houston.

Nabro Volcano

Nabro Volcano

Acquired by the Advanced Spaceborne Thermal Emission and Reflection Radiomter (ASTER) aboard the Terra satellite on September 1, 2011.

This long-dormant Eritrean volcano began erupting in June, but it’s so remote (at least for western media and scientists) that there’s been no news from the area for months. Unfortunately it’s often been cloudy, so we haven’t gotten any good satellite imagery, either. The best recent imagery is this false-color image (vegetation is red), which shows activity has ceased, although there may be a slight hint of gas emissions near the vent. We’re still trying for better imagery, and will post anything we get in our Volcanoes and Earthquakes section.
 

Riley Road Fire

Astronaut photograph ISS028-E-44676 taken on September 11, 2011.

Closer to NASA’s home is this photograph from last week of smoke from the Riley Road Fire, which burned 18,960 acres (7,670 hectares) near Houston, Texas (visible in the upper right corner). It was taken by an astronaut aboard the International Space Station, who could probably see his (the Expedition 28 crew is all male) house at the time.

Credit for the Nabro Volcano image goes to the the NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team, and credit for the Riley Road Fire to the Image Science and Analysis Laboratory, NASA-Johnson Space Center.
 

Time Lapse from the ISS: Africa to Mongolia

September 14th, 2011 by Robert Simmon

A time-lapse sequence from the International Space Station taken on September 3, 2011. The station starts above Northern Africa, then passes over the Mediterranean Sea and Turkey, followed by the Black and Caspian Seas, the Great Steppe, and finally Mongolia and Lake Baikal.

For more ISS (and Shuttle, Apollo, etc.) photos, check out The Gateway to Astronaut Photography of Earth.

Why I love Geologists

August 30th, 2011 by Robert Simmon

Of all the Earth sciences, geology has the strongest tradition of visual communication. It’s probably because mapping is fundamental to the field, and geologists have 200 years of practice at it. As a result, they tend to create well designed imagery.

Two exemplary techniques geologists use: they almost always include a scale, and they often annotate images directly, rather than relying on separate keys or text descriptions. Here’s an example from Lockwood DeWitt, of Outside the Interzone:

Photograph of Table Rock Tuff, Oregon, with hammer for scale.

Photograph of Table Rock Tuff, Oregon, with hammer for scale.

Callan Bentley, author of Mountain Beltway, added annotations that show small faults, and the distribution of grain size in the rock:

Annotated image of faults.

Annotated image of faults.

Callan even used different colors to differentiate types of information, and varied the size labels to emphasize the location and type of faulting. Excellent work.

Here’s what Lockwood had to say about Table Rock:

Table Rock is quite similar to the more widely known Fort Rock, but larger and better preserved. It erupted enough material that toward the end, it had raised a cone above the original water-influenced explosive (hydrophreatic) vent. The final phase was a more gentle effusive basalt eruption, which filled in the hollow interior. Without that basalt filling, Table Rock would look very similar indeed to Fort Rock. Here’s the location in FlashEarth, maybe a hundred yards north of the dirt road. The two features both lie in the Fort Rock-Christmas Valley, which were filled by a pluvial lake during the Pleistocene. Even a quick glance over this area reveals quite a few similar water-mediated eruptions. In this view, Hole-in-the-Ground is in the left of the top middle, Fort Rock is in the upper middle, just to left of the four center-pivot irrigation fields, turning the rotated “L” into a backwards “C,” and Table Rock is in the bottom right middle, just above and a bit to the right of the Highway 31 label and tight cluster of irrigated fields.

By the way, I don’t include a scale in every image. Sometimes I just want to let the beauty of a spot be what it is. so I take two pictures. One with, and one without, scale. Here’s an example from a couple days earlier, sans scale. But I have a number of other photos of the same spot (not posted yet) that do provide a sense of scale.

I rest my case.

Spatial Humanities

July 26th, 2011 by Robert Simmon

There’s an interesting article in today’s New York Times about mapping historical landscapes: Digital Maps Are Giving Scholars the Historical Lay of the Land.

Few battles in history have been more scrutinized than Gettysburg’s three blood-soaked days in July 1863, the turning point in the Civil War. Still, there were questions that all the diaries, official reports and correspondence couldn’t answer precisely. What, for example, could Gen. Robert E. Lee actually see when he issued a series of fateful orders that turned the tide against the Confederate Army nearly 150 years ago?

Now historians have a new tool that can help. Advanced technology similar to Google Earth, MapQuest and the GPS systems used in millions of cars has made it possible to recreate a vanished landscape. This new generation of digital maps has given rise to an academic field known as spatial humanities.

Along with some nice examples.

2011 GRC Visualization in Science and Education

July 18th, 2011 by Robert Simmon

Although I got back from the 2011 GRC Visualization in Science and Education conference Friday night, my brain still hurts (in a good way). Thanks to Liz and Ghislain for their superb job as conference chairs. To me, the theme of this year’s conference was salience (more precisely, perceptual salience)–the ability of our visual system to focus on one thing at a time, to the near exclusion of everything else.

Hold one hand out in front of you, with the thumb up, and focus on the thumbnail. This is the limit of your locus of attention: about one degree. Away from that point everything else in your visual field fades into the background. For data visualization this is both an advantage (you can draw people to the important parts of an image) and a drawback (it’s impossible to pay attention to two things at once, and it’s easy to have your focus shifted unintentionally).

I’ll have some examples, and interesting bits from the presentations and discussion, in the next few days and weeks.