Projection Request #9

Closed
bigmadhabib opened this Issue Dec 29, 2011 · 7 comments

2 participants

@bigmadhabib

Any chance you'd consider supporting the Kavrayskiy VII, Eckert IV or Winkel-Tripel projections? It looks like PROJ.4 supports those projections.

Thanks!

@jswhit

Eckert III (Winkel Tripel) and IV are possible, but not Kavrayskiy since proj4 doesn't do the inverse.

However, both look very similar to the Robinson. What's your use case?

-Jeff

@bigmadhabib

The Winkel (and Kavrayskiy 7) seem to be regarded as projections with the least distortion and the Eckert 4 seems to be regarded as the best area-preserving projection, at least by this professor . Though this researcher finds the Robinson to be better. (I'm not a cartographer, so I'm not sure). I'm mainly looking at different ways to visualize global data contours, and examining different map projections.

@jswhit

OK - but unless you have a real pressing need for adding those, I can't justify spending the time on it. Of course, patches are welcome.

@bigmadhabib

Fair enough, I'll send a patch your way if I find time to implement them. Thanks!

@jswhit

It turned out to be very easy to add - the 'eck4' and 'kav7' projections are now in my fork (https://github.com/jswhit/basemap). Please let me know if they work as expected, and then I will merge them into the master.

@jswhit

created #10

@jswhit

'kav7' and 'eck4' now added to master

@jswhit jswhit closed this Jan 19, 2012
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