[R-sig-Geo] Aitoff projection for histograms

[Roger Bivand]

On Wed, 28 Jul 2010, Krzysztof Nienartowicz wrote:

> Hello,
> I am a complete newbie and would be grateful for any hints if it is possible to create Aitoff projections over some Z parameter in the dataframe using some geo package?
> It would be used for astronomy data mining. I use r-postgres to fetch data so postgres gis extensions could be of use as well.

Using the PROJ.4 library through rgdal, you may find +proj=aitoff relevant 
in your CRS (coordinate reference system) definition. I suggest testing 
with caution on known pairs of coordinates to work out the syntax, until 
you are sure that it is giving you what you need.

Roger

> Best regards,
> Krzysztof
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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