private static function initvars()
{
tools::$a = 6378388;
tools::$f = 1 / 297;
tools::$x0 = 150000.013;
tools::$y0 = 5400088.438;
tools::$e = sqrt(2 * tools::$f - tools::$f * tools::$f);
tools::$p0 = deg2rad(90);
tools::$p1 = deg2rad(49.83333367);
tools::$p2 = deg2rad(51.166664006);
tools::$l0 = deg2rad(4.367158666);
tools::$m1 = cos(tools::$p1) / sqrt(1 - tools::$e * tools::$e * sin(tools::$p1) * sin(tools::$p1));
tools::$m2 = cos(tools::$p2) / sqrt(1 - tools::$e * tools::$e * sin(tools::$p2) * sin(tools::$p2));
tools::$t1 = tan(pi() / 4 - tools::$p1 / 2) / pow((1 - tools::$e * sin(tools::$p1)) / (1 + tools::$e * sin(tools::$p1)), tools::$e / 2);
tools::$t2 = tan(pi() / 4 - tools::$p2 / 2) / pow((1 - tools::$e * sin(tools::$p2)) / (1 + tools::$e * sin(tools::$p2)), tools::$e / 2);
tools::$t0 = tan(pi() / 4 - tools::$p0 / 2) / pow((1 - tools::$e * sin(tools::$p0)) / (1 + tools::$e * sin(tools::$p0)), tools::$e / 2);
tools::$n = (log(tools::$m1) - log(tools::$m2)) / (log(tools::$t1) - log(tools::$t2));
tools::$g = tools::$m1 / (tools::$n * pow(tools::$t1, tools::$n));
tools::$r0 = tools::$a * tools::$g * pow(tools::$t0, tools::$n);
}
