[R-sig-Geo] Map projectin for Europe...

[Roger Bivand]

On Fri, 20 Apr 2007, Takatsugu Kobayashi wrote:

> Hi,
> 
> I has a meteorology project in which I have to map average wind speeds 
> over EU, as well as European countries' boundary. I have been looking 
> online for free European maps like the one I can find on US Census for 
> N. America. But it seems like google doesn't hit anything useful. I 
> wonder if some Rusers from Europe might know where I could find free EU 
> map with each country's boundary.
> 

Here is a link to the world map with country boundaries which was 
discussed on the list in September last year, updated for R >= 2.4.

http://spatial.nhh.no/R/etc/world_countries_24.rda

load("world_countries_24.rda")

You'll need to subset the object to choose the countries of Europe that 
you require, then use the spTransform() method in rgdal to go to the 
standard EU Lambert AEA:

CRS("+init=epsg:3035")

Hope this helps,

Roger


> Just a few quick questions:
> 
> About the best or appropriate projection for Europe, I am thinking to 
> use lambert conformal conic or lambert azimuthal equal area. Are these 
> good for Europe? My colleague uses the latter lambert for N. America 
> mapping.
> 
> About plotting a map boundary, if I do not rely on mapproj and shapefile 
> library, simply using plot() or xyplot() gave me a disatrerous map, 
> where points are not sequentially connected at all.. I believe I would 
> have to add some kinds of flags to the boundary dataset.
> 
> Could anyone kindly give me advice on these problems although I have 
> never changed map projections in R, but I will look into mapproj library 
> as a start?
> 
> Thanks in advance.
> 
> taka
> 
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-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no