How to calculate angle in degrees between two points ?

[yanc0]

Hi folks !

I was wondering if anyone has calculated headings in degrees between two points on a line ?

"geometry": {
  "type": "LineString",
  "coordinates": [
    [-0.2354821, 49.2847621],
    [-0.2354258, 49.2848422]
  ]
}

It seems that ST_Azimuth should do the trick but it's not available in spatial extension (yet ?).

[bradh]

Looks like it was added in #596