Geo projection of astronomical image data

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1

Hello. I have some all-sky astronomical image data which I would like to display as an intensity map, using something like an Aitoff projection. The data is just a raster image of intensities, laid out in Galactic long/lat coordinates. Is there some library function or established D3 technique to accomplish this? I could just do the transformation and plot the pixels directly, but was wondering if this had already been solved elsewhere. Thanks!

Dave

2

Do you need to convert coordinate systems?
This might help: GitHub - chrisveness/geodesy: Libraries of geodesy functions implemented in JavaScript

3

You might try Aitoff GLSL / Fil / Observable if you need to project a raster image in Aitoff.

4

Thanks, this looks great. I’m going to fork and hack on it a bit, since I don’t actually have an Image as a starting point, but am rendering the raster data directly to a canvas. It looks like I should be able to adapt your approach here.

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