src/Common.php
public static function tsfnz($eccent, $phi, $sinphi)
    {
        $con = $eccent * $sinphi;
        $com = 0.5 * $eccent;
        $con = pow(((1.0 - $con) / (1.0 + $con)), $com);

        return (tan(0.5 * (M_PI_2 - $phi) ) / $con);
    }
public static function tsfnz($eccent, $phi, $sinphi)
    {
        $con = $eccent * $sinphi;
        $com = 0.5 * $eccent;
        $con = pow(((1.0 - $con) / (1.0 + $con)), $com);

        return (tan(0.5 * (M_PI_2 - $phi) ) / $con);
    }
public static function tsfnz ( $ eccent , $ phi , $ sinphi ) { $ con = $ eccent * $ sinphi ; $ com = 0.5 * $ eccent ; $ con = pow ( ( ( 1.0 - $ con ) / ( 1.0 + $ con ) ) , $ com ) ; return ( tan ( 0.5 * ( M_PI_2 - $ phi ) ) / $ con ) ; }
Function to compute the constant small t for use in the forward
computations in the Lambert Conformal Conic and the Polar
Stereographic projections.

@param float $eccent
@param float $phi
@param float $sinphi
@return float
Function to compute the constant small t for use in the forward computations in the Lambert Conformal Conic and the Polar Stereographic projections .