[Proj] Standard projection for Mediterranean basin

Gerald I. Evenden geraldi.evenden at gmail.com
Sat Feb 13 13:16:00 EST 2010

On Saturday 13 February 2010 12:28:57 pm Luigi Ponti wrote:
> Hello,
> I use PROJ.4 via GRASS GIS, and I would like to know if anyone is aware
> of a standard projection for mapping the whole Mediterranean basin. I
> need to do raster-based statistics on the maps, so I guess what I am
> looking for is an equal area projection.
> What I have found on the Web is a GIS built by the Joint Research Center
> (JRC http://www.jrc.ec.europa.eu/) that used Lambert Azimuthal Equal
> Area (LAEA) for the Mediterranean:
> http://re.jrc.ec.europa.eu/pvgis/info/faq.htm#projection
> However, it adopted the same projection center for both Europe and the
> Mediterranean (0 °E and 48 °N). Is this correct?
> There is also a workshop report
> http://www.ec-gis.org/sdi/publist/pdfs/annoni-etal2003eur.pdf
> that recommended LAEA with projection center 9 °E and 53 °N to be used
> for statistical mapping in the European Union.
> Based on this background it seems like LAEA would be fine. However, I am
> unsure if there is a standard projection center and datum.
> Thank you for any hints. Kind regards,
> Luigi
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Personal opinion: because you seem to have your own project needs that has not 
shown a need to match any existing projection I would, because of the general 
E-W shape of your region, select Albers Equal Area conic. With reasonably 
selected parallels is should give you less distortion at the extremities than 
the azimuthal projection.

A little parameter tuning needs to be done.

I would not be prejudiced by projections where the needs to cover the entire 
continent are are the primary consideration.

The whole religious complexion of the modern world is due
to the absence from Jerusalem of a lunatic asylum.
-- Havelock Ellis (1859-1939) British psychologist

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