2369 search results for "Map"

Boundary conditions Dominate

October 16, 2010
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Boundary conditions Dominate

In part 1 and part 2 we went over the background of nightlights and the fundamental problem: Station inventory data had errors in it: In Hansen 2010, Hansen writes: “ Station location in the meteorological data records is provided with a resolution of 0.01 degrees of latitude and longitude, corresponding to a distance of about 1

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2010 ggplot2 Case Study Competition Winners

October 16, 2010
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The 2010 ggplot2 Case Study Competition Winners have been announced!  Congratulations to the winners!Grand Prize: David Kahle, Rice UniversityFinalist: Michael Lavine, UMass Amherst Finalist: Claudia Beleites, TU Dresden & Uni....

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2010 ggplot2 Case Study Competition Winners

October 16, 2010
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The 2010 ggplot2 Case Study Competition Winners have been announced!  Congratulations to the winners!Grand Prize: David Kahle, Rice UniversityFinalist: Michael Lavine, UMass Amherst Finalist: Claudia Beleites, TU Dresden & Uni....

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Accuracy in Inventories and Nightlights Part II

October 16, 2010
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Accuracy in Inventories and Nightlights Part II

In part 1 we discussed UHI in a general way and introduced NASA’s use of nightlights to identify Rural, periurban and Urban stations. Very simply, the latitude and longitude data in the station inventory is used to look up at radiance value in the nightlights file. If that value is  10 or less, the site

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Nightlights: First Principles

October 15, 2010
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Nightlights: First Principles

With the publication of Hansen2010 forthcoming it is critical to examine the subject afresh. The global temperature index product from NASA is known as GISSTEMP .GISSTEMP, like the temperature index from Hadley/CRU and NCDC attempts to estimate the average temperature of the globe using historical data archived in the GHCN ( Global Climate Historical Network)

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Nightlights: cool data, bad geocoding

October 14, 2010
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Nightlights: cool data, bad geocoding

A global source of population density has been on my low-priority wish list for some time, so I was very excited when I found Steve Mosher’s work with the Nighlights data set. “Nightlights” refers to the artificial lights seen from space at night. Astronomers call it “light pollution” which is pretty accurate since it’s decidedly

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Which parents are satisfied with their child’s education? Those who know their class representative well. Especially in poor schools.

October 14, 2010
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Which parents are satisfied with their child’s education? Those who know their class representative well. Especially in poor schools.

Another result from our OSI / ESP survey of nearly 11000 parents in ten countries. Dots are individual parents.The y-axis is individual parents' overall satisfaction with their children's education. Red dots are parents who know the...

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Which parents are satisfied with their child’s education? Those who know their class representative well. Especially in poor schools.

October 14, 2010
By
Which parents are satisfied with their child’s education? Those who know their class representative well. Especially in poor schools.

Another result from our OSI / ESP survey of nearly 11000 parents in ten countries. Dots are individual parents. The y-axis is individual parents’ overall satisfaction with their children’s education. Red dots are parents who know their parent representatives well, blue dots are parents who do not; i.e. colour is mapped to the variable par.rep.1

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Kuwait Airport

October 14, 2010
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Kuwait Airport

  Kuwait International airport. Giss has it as nightlights =0, so do I. By looking at comparisons of nightlights with the station centered and a static google map with the station centered, there are mismatches between GISS and Me and between Nightlights and the  world. Subtle shift here and there. Annoying. Also, you can see

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Lists of English Words

October 12, 2010
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Lists of English Words

When I was a kid, I went through an 80s music phase…well, some things never change. “People just love to play with words…” Know that song? Anyway… One of the biggest pains of text mining and NLP is colloquialism — language that is only appropriate in casual language and not in formal speech or writing. Words such as informal contractions...

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