Dec 222012
 

Bogda Mountains from Earth as Art

The Earth as Art is a compilation of NASA satellite imagery that shows the planet from a new perspective. The sensors on the satellite measure light outside the visible range, which makes for beautiful and unexpected pictures.

In 1960, the United States put its first Earth-observing environmental satellite into orbit around the planet. Over the decades, these satellites have provided invaluable information, and the vantage point of space has provided new perspectives on Earth. This book celebrates Earth’s aesthetic beauty in the patterns, shapes, colors, and textures of the land, oceans, ice, and atmosphere.

Available as PDF or as an iPad app. I'm glad the world didn't end.

Jun 062012
 

Income inequality

Researchers Pengyu Zhua and Yaoqi Zhang noted in their 2008 paper that "the demand for urban forests is elastic with respect to price and highly responsive to changes in income." Poor neighborhoods tend to have fewer trees and the rate of forestry growth is slower than that of richer neighborhoods.

Tim De Chant of Per Square Mile wondered if this difference could be seen through satellite images in Google Earth. It turns out that you can see the distinct difference in a lot of places. Above, for example, shows two areas in Rio de Janeiro: Rocinha on the left and Zona Sul on the right. Notice the tree-lined streets versus the not so green.

De Chant notes:

It's easy to see trees as a luxury when a city can barely keep its roads and sewers in working order, but that glosses over the many benefits urban trees provide. They shade houses in the summer, reducing cooling bills. They scrub the air of pollution, especially of the particulate variety, which in many poor neighborhoods is responsible for increased asthma rates and other health problems. They also reduce stress, which has its own health benefits. Large, established trees can even fight crime.

Okay, I don't now about that last part about fighting crime. Without seeing the data, I think that sounds like a correlation more than anything else, but still. Trees. Good.

[via Boing Boing]

Jun 062012
 

Geography of incarceration

New York University graduate student Josh Begley grabbed 4,916 satellite images of prisons via the Google Maps API and put them all in one place. It's called Prison Map.

The United States is the prison capital of the world. This is not news to most people. When discussing the idea of mass incarceration, we often trot out numbers and dates and charts to explain the growth of imprisonment as both a historical phenomenon and a present-day reality.

But what does the geography of incarceration in the US actually look like? Prison Map is my attempt to answer that question.

Most are isolated boxes surrounded by a lot of field, but oddly there are some in close proximity to residential. There's one towards the bottom that actually does look like a residential area. Either it's an blip or grandma is running a prison in the basement. Probably the former.

Mar 252010
 
GIS image

The Technology Manager for the History Department at Princeton University, Carla Zimowsk has provided technical support for the department for 10 years. Not trained as a historian or a GIS expert, she draws upon graduate work in organizational communications and knowledge management. As a result, during the past decade, she has come to understand the needs of those she supports.

"The faculty all have stuff," she began at the March 24 Lunch 'n Learn seminar, "and it tells a story when pulled together." In a trip to the Visualization Centre at the University of Birmingham several years ago, she suddenly realized the importance of visualizing data.

On her return, she began to assist a steadily growing number of history faculty who are also excited about the use of such tools. In a Lunch ‘n Learn presentation on March 5, 2008, Professor John Haldon discussed the Avkat Project, a study of small fortress town near Armenia between the 5^th and 11^th centuries. Avkat uses the technology to assemble images, tax records, and even to predict where to dig. The result is a multi-disciplinary approach to a complete material culture and landscape evolution sequence from the Neolithic period through the modern day. Haldon has been able to calculate population densities primary dietary requirements, and estimate land uses.

In another Lunch ‘n Learn presentation on March 26, 2008, Professor Emmanuel Kreike showed how he was able to place fly-over maps from the 1940s with present-day satellite imagery to draw conclusions about deforestation and settlement over time in Namibia. His GIS databases also contain modern features, from roads and fences through buildings and wells, tax records, photographs, and even interviews with local inhabitants.

politicalmap.jpg

Modern Geographical Information Systems reveal relationships, patterns, and trends, not only about physical features, but economic and social phenomena. History Professor Rob Karl is using GIS to search for useful correlations in the international history of political violence. He has charted the distribution of major bandit groups and community action boards as well as changes in political affiliation in Columbia.

Professor Yair Mintzler is studying the defortification of German cities in the 18th and 19th centuries. Charting such events permits scholars to observe key trends. Mintzler plans another interesting use of information technology, the online replication of a German prison.

“What do historians do with computers other than use them as glorified typewriters?” This was the question that Zimowsk most often got from colleagues when she first started providing technical support in the history department in 1999. Ten years later, the question hasn’t changed much as some might now ask, “What do historians do with computers other than create PowerPoint shows for class?”

Both questions assume that historians only concern themselves with archival collection and recollection of dates, events, places, or people. By working with and observing these historians, she has learned that while they are interested in these individual facts, they are also interested in making connections and inferences from among them and in that, finding patterns, making comparisons, or trying to visualize and experience what cannot be seen, touched, or witnessed first-hand.

CarlaZimowskSm.jpg Speaker Bio: Before working in the University’s History Department, Carla worked for the Art Museum for seven years, and before that Graduate Admissions. Carla has degrees from Blackburn College in Music and a Masters in Communication and Information from Rutgers.

A podcast and the presentation are available.