[R] Projecting data on a world map using long/lat

Greg Snow Greg.Snow at imail.org
Fri Dec 10 03:45:32 CET 2010

The symbols function can add circles to an existing plot with the diameter based on another variable.  You may need to project points if you draw a map with a projection.

Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of mathijsdevaan
> Sent: Thursday, December 09, 2010 7:21 PM
> To: r-help at r-project.org
> Subject: [R] Projecting data on a world map using long/lat
> Hi,
> I have a dataset (CSV) with some counts of firms located around the
> globe.
> Each count is assigned to the longitude and latitude of the specific
> location. Now I want to plot these counts on a world map using dots
> (size of
> dots represent the count). I have been unable to find any info on
> whether
> this is possible and if so, how? Can you please help me? Thanks!
> Mathijs
> --
> View this message in context: http://r.789695.n4.nabble.com/Projecting-
> data-on-a-world-map-using-long-lat-tp3081298p3081298.html
> Sent from the R help mailing list archive at Nabble.com.
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