Best projection for specific countries?

[jerome cukier]

Hi, 

Among the many projections that d3 offers, is d3.geo.albersUSA, which has two characteristics: Albers is used by the US Census Bureau, which makes it as close to an "official" projection as it gets, and d3's implementation is a composite one with special treatment for Alaska, Hawaii or Puerto Rico (http://bl.ocks.org/mbostock/5545680). 

Now there are lots of examples of USA maps out there. I am interested in making good maps at the country levels for other large countries. 

I am both looking for settings for the projection proper, as well as for best practices or hacks such as the one used to scale down Alaska in the d3.geo.albersUSA function. 

Has anyone worked on some kind of atlas of best projections? For instance, I'm aware that most countries in Europe use either a form of transverseMercator or conicConformal. 

(see http://www.ec-gis.org/sdi/publist/pdfs/annoni-etal2003eur.pdf#page=43). Has anyone implemented these projections with settings they are happy about?

And what about Japan? Brazil? India? etc.(ftr, I'm trying to map maybe the 20 or 30 largest countries). 

For instance for Japan, do people typically plot islands according to their geographic position, or do they try to make them closer than what they are / scale them so that most of the map surface is used? 

Thanks!

j

[Enrico Spinielli]

Hi Jerome,

incidentally I used your same reference to decide on projection and bounding box for one of my maps (Europe).

The other thing I have been looking after is to define a repo similar to Mike's [world | us]-atlas for Europe.

I have a (not yet public) repo in place and am collecting/investigating how to massage the data from Eurostat.

(but Europe is much messier than the States in terms of availability of data, i.e. postal zip codes are for purchase for certain countries...!)

For map projections in Europe I found this site.

Italy (my home country): Gauss-Boaga, official Italian national projection, as described here.

Bye

Enrico

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