Aitoff and sinusoidal geo projections

[collioud]

Hello,

I noticed by looking at the plotly.js file that two geo projections are already included : the aitoff and the sinusoidal one. But these are not directly usable because they are not referenced.
This could be done by adding the two following code lines into the plotly.js file :

// projection names to d3 function name
params.projNames = {
    // d3.geo.projection
    ...
    'aitoff': 'aitoff',           
    'sinusoidal': 'sinusoidal'   
};

Of course, the API reference should be also updated.

I am very pleased that these are already included since I need the aitoff projection for one project of mine. I didn't feel adding a projection "from scratch" into Plotly.js...

[etpinard]

Ha good 👁️

The sinusoidal projection is indeed exported in our projections bundle but currently and mistekenly not exposed.

I don't think we ever planned on exposing the Aitoff projection, but as the popular Winkel Triplet projection depends on Aitoff, might as well expose it also.

Thanks for posting!