[Proj] Optimal Albers Standard parallels

[strebe]

Oscar:

Presumably "LAEA" = Lambert azimuthal equal-area projection, in which case it has no standard parallels. The question would be where to center it. That's an easier problem to solve in the typical case than Albers; you simply find the small circle that circumscribes the area of interest. That small circle's center coincides with the center of the optimal Lamber azimuthal equal-area for the region.

Regards,
— daan Strebe


On Feb 20, 2010, at 8:09:00 AM, OvV_HN <ovv at hetnet.nl> wrote:

Noteworthy is the article: 
An equal area projection for statistical mapping in the EU, Lysandros 
Tsoulos. 
To be found in the collection: 
Map projections for Europe, Institute for Environment and Sustainability, 
2001. 
See page 50 f.f. 
The author proposes a map projection for the whole of Europe with reasonably 
low distortions. 
Albers and LAEA are considered. The distortions at the boundaries of the EU 
are lower with a LAEA than with an Albers projection. 
http://www.ec-gis.org/document.cfm?id=425&db=document 
http://www.ec-gis.org/sdi/publist/pdfs/annoni-etal2003eur.pdf 


By the way, do you have a similar algorithm for optimal parallels for the 
LAEA projection? 


Oscar van Vlijmen 


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