715 search results for "maps"

Google maps and travel times

April 1, 2011
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Google maps and travel times

Travel times and trip distances are at the core of urban economics. Many models of competition, housing markets, etc., rely on travel times or distances to explain the variance in economic outcomes. Determining travel times, especially non free-flow travel times (i.e., accounting for congestion) is however no trivial task. Google maps offer a...

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Example 8.31: Choropleth maps

March 22, 2011
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Example 8.31: Choropleth maps

In our book, we show a simple example of a map (section 6.4.2) where we read the boundary files as data sets and use SAS and R to plot them. But both SAS and R have complex functionality for using pre-compiled map data. To demonstrate them, we'll sho...

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Global Migration Maps

March 17, 2011
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Global Migration Maps

 Migrations of people have existed for millennia and oc

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Fixing Up smoothScatter Heat Maps

February 2, 2011
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Fixing Up smoothScatter Heat Maps

A while back, I posted an article using the smoothScatter function in R that builds a color representation of density for scatter plots. When I first found the function, I was extremely excited because it's a very easy and automated way to make a heat...

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Fixing Up smoothScatter Heat Maps

February 2, 2011
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Fixing Up smoothScatter Heat Maps

A while back, I posted an article using the smoothScatter function in R that builds a color representation of density for scatter plots. When I first found the function, I was extremely excited because it's a very easy and automated way to make a heat...

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Maps with R, part… n+1

January 11, 2011
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Maps with R, part… n+1

Following the idea posted on James Cheshire's blog (here), I have tried to play a little bit with R and Google. And it works ! Consider for instance life expectancy at birth (that can be found - and downloaded - here). Using the following code, it ...

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OpenData + R + Google = Easy Maps

January 11, 2011
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OpenData + R + Google = Easy Maps

The release of the R package “googleVis” has made the production of interactive maps through Google’s Chart Tools a simple task. Ignoring the some basic data manipulation the below map...

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Customizing Maps in R: spplot() and latticeExtra functions

December 15, 2010
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Customizing Maps in R: spplot() and latticeExtra functions

I recently noticed the new latticeExtra page on R-forge, which contains many very interesting demos of new lattice-related functionality. There are strong opinions about the "best" graphics system in R (base graphics, grid graphics, lattice, ggplot, et...

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Rethinking ‘loess’ for Binomial-Response Pitch F/X Strike Zone Maps

December 5, 2010
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Rethinking ‘loess’ for Binomial-Response Pitch F/X Strike Zone Maps

So after a long hiatus, I'm back for today. I've been crazy busy with a number of different things--including getting engaged and helping plan out wedding dates and things of that sort--and unfortunately have not kept up here on this blog (or on Fanta...

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Choropleth Maps of Presidential Voting

November 1, 2010
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Choropleth Maps of Presidential Voting

Having always appreciated the red and blue cartograms and cartographs of geographic electoral preferences, such as those made available by Mark Newman, I sought to produce similar maps, but include information about support for non-”state-sponsored” parties, and to extend the coverage back in time. I was able to find county-level presidential election returns going as … Read more

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