cdm/src/main/java/ucar/unidata/geoloc/projection/AlbersEqualArea.java
private double computeTheta(double lon) {
    double dlon = LatLonPointImpl.lonNormal(Math.toDegrees(lon) - lon0Degrees);
    return n * Math.toRadians(dlon);
  }
private double computeTheta(double lon) {
    double dlon = LatLonPointImpl.lonNormal(Math.toDegrees(lon) - lon0Degrees);
    return n * Math.toRadians(dlon);
  }
private double computeTheta ( double lon ) { double dlon = LatLonPointImpl . lonNormal ( Math . toDegrees ( lon ) - lon0Degrees ) ; return n * Math . toRadians ( dlon ) ; }
Compute theta

@param lon longitude
@return theta
Compute theta