import - Importing FITS file from HEALPix

I am trying to read FITS file created by HEALPix software. The file contains a spherical map of a scalar field.

There is the online support on how to use the file in IDL, but not for Mathematica.

I understand FITS is partly binary format, but I expect it is still standardised and contains readable description on how the data is stored.

I tried reading Elements from the file in this way

Import["test.fits", #] & /@ 
  Import["test.fits", "Elements"]

but the output is quite short and mainly empty lists, especially for

Import["test.fits", "Data"]
Import["test.fits", "TableData"]

The size of my file is 12.6 MB. Here is a link to the file.

Is there another way to read the content of FITS file, besides these general 'Elements'?

Do I need to know something about the structure of my FITS file in order to be able to read it with Mathematica? Could it be the problem is that Mathematica does not read all types of FITS files?

Comments

plotting - Plot 4D data with color as 4th dimension

I have a list of 4D data (x position, y position, amplitude, wavelength). I want to plot x, y, and amplitude on a 3D plot and have the color of the points correspond to the wavelength. I have seen many examples using functions to define color but my wavelength cannot be expressed by an analytic function. Is there a simple way to do this? Answer Here a another possible way to visualize 4D data: data = Flatten[Table[{x, y, x^2 + y^2, Sin[x - y]}, {x, -Pi, Pi,Pi/10}, {y,-Pi,Pi, Pi/10}], 1]; You can use the function Point along with VertexColors . Now the points are places using the first three elements and the color is determined by the fourth. In this case I used Hue, but you can use whatever you prefer. Graphics3D[ Point[data[[All, 1 ;; 3]], VertexColors -> Hue /@ data[[All, 4]]], Axes -> True, BoxRatios -> {1, 1, 1/GoldenRatio}]

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