[R-sig-Geo] Contour maps from twitter

Barry Rowlingson b.rowlingson at lancaster.ac.uk
Sat Sep 11 09:55:36 CEST 2010

On Sat, Sep 11, 2010 at 4:28 AM, Ben Nolan <bnolan at gmail.com> wrote:
> Thought some of you might like this.
> http://bennolan.com/2010/09/10/contour-maps.html

 Neat. Things you might like to do include:

 1. Adding a background image, either OpenStreetMap via my "webmaps"
package, or get Ordnance Survey raster data. You may have to transform
from lat-long to OSgrid ref, but that's all in the spTransform

 2. Make a web-based animation like this:


 using my animation framework:


 3. Check out the Spatial Task View on CRAN and get to know the
packages: sp, spTransform, rgdal, raster.

 4. Show us your code?

> I'm loving learning R. Very cool. I'd like to use it for some proper
> analysis though (epidemiology or something), instead of tweet maps. :)

 Maybe if you mapped every tweet that mentioned the word 'sneeze'
you'd get the epidemiology of the common cold - not quite as
ridiculous as it sounds:



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