float vResRad = Length.DECIMAL_DEGREE.toRadians(vRes);
float hResRad = Length.DECIMAL_DEGREE.toRadians(hRes);
Length units = grid.getUnits();
double vDist = Math.pow(2.0 * (double) units.fromRadians(vResRad), 2);
double hDist = Math.pow(2.0 * (double) units.fromRadians(hResRad), 2);
return modifier * Math.sqrt(vDist + hDist);
}