【文件属性】：
文件名称：高斯投影正反算及邻带换算
文件大小：5KB
文件格式：CS
更新时间：2022-04-15 16:15:17
c#
话不多说，直接上代码
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace _高斯投影
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}
double DD2RAD(double n)
{
double DD; double MM; double SS;
DD = Math.Floor(n);
MM = Math.Floor((n - DD) * 100);
SS = ((n - DD) * 100 - MM) * 100;
n = (DD + MM / 60.0 + SS / 3600.0) * Math.PI / 180.0;
return n;
}
private void Form2_Load(object sender, EventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{
double B, L;
B = double.Parse(textBox1.Text);
B = DD2RAD(B);
L = double.Parse(textBox2.Text);
L = DD2RAD(L);
double L0 = double.Parse(textBox3.Text);
L0 = DD2RAD(L0);
double a = double.Parse(textBoxa.Text);
double e2 = double.Parse(textBoxe2.Text);
double A = 1.0 + 3.0 * e2 / 4 + 45.0 * e2 * e2 / 64 + 175.0 * Math.Pow(e2, 3) / 256 + 11025.0 * Math.Pow(e2, 4) / 16384 + 43659.0 * Math.Pow(e2, 5) / 65536;
double B0 = 3.0 * e2 / 4 + 15.0 * e2 * e2 / 16 + 525.0 * Math.Pow(e2, 3) / 512 + 2205.0 * Math.Pow(e2, 4) / 2048 + 72765.0 * Math.Pow(e2, 5) / 65536;
double C = 15.0 * e2 * e2 / 64 + 105.0 * Math.Pow(e2, 3) / 256 + 2205.0 * Math.Pow(e2, 4) / 4096 + 10395.0 * Math.Pow(e2, 5) / 16384;
double D = 35.0 * Math.Pow(e2, 3) / 512 + 315.0 * Math.Pow(e2, 4) / 2048 + 31185.0 * Math.Pow(e2, 5) / 131072;
double α = A * a * (1 - e2);//α
double β = -B0 * a * (1 - e2) / 2.0;//β
double γ = C * a * (1 - e2) / 4.0;
double σ = -D * a * (1 - e2) / 6.0;
double X = α * B + β * Math.Sin(2 * B) + γ * Math.Sin(4 * B) +
σ * Math.Sin(6 * B);//数值X
double N;
N = a / Math.Sqrt((1 - e2 * Math.Pow(Math.Sin(B), 2)));
double q = e2 / (1 - e2); //E'2
double c = q * Math.Pow(Math.Cos(B), 2);//n2
double t = Math.Tan(B);
double l = L - L0;
double x = X + N * Math.Sin(B) * Math.Cos(B) * l * l / 2.0 + N * Math.Sin(B) * Math.Pow(Math.Cos(B), 3) * Math.Pow(l, 4) * (5 - t * t + 9 * c + 4 * Math.Pow(c, 2)) / 24.0
+ N * Math.Sin(B) * Math.Pow(Math.Cos(B), 5) * Math.Pow(l, 6) * (61 - 58 * t * t + Math.Pow(t, 4) + 270 * c - 330 * c * Math.Pow(t, 2)) / 720.0;
double y = N * Math.Cos(B) * l + N * Math.Pow(Math.Cos(B), 3) * (1 - t * t + c) * Math.Pow(l, 3) / 6.0 + N * Math.Pow(Math.Cos(B), 5) * (5 - 18 * t * t + Math.Pow(t, 4) + 14 * c - 58 * c * t * t) * Math.Pow(l, 5) / 120.0;
x = Math.Round(x, 6);
y = Math.Round(y, 6);
double o = double.Parse(textBox6.Text);
double P = y + 500000 + o * 1000000;
textBox4.Text = x.ToString();
textBox5.Text = P.ToString();
}
private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)
{
if (comboBox2.Text == "BJ54")
{
double a = 6378245; double e2 = 0.006693421622966;
textBoxa.Text = Convert.ToString(a);
textBoxe2.Text = Convert.ToString(e2);
}
if (comboBox2.Text == "XA80")
{
double a = 6378140; double e2 = 0.006694384999588;
textBoxa.Text = Convert.ToString(a);
textBoxe2.Text = Convert.ToString(e2);
}
if (comboBox2.Text == "WGS84")
{
double a = 6378137; double e2 = 0.00669437999013;
textBoxa.Text = Convert.ToString(a);
textBoxe2.Text = Convert.ToString(e2);
}
if (comboBox2.Text == "CGCS2000")
{
double a = 6378137; double e2 = 0.00669438002290;
textBoxa.Text = Convert.ToString(a);
textBoxe2.Text = Convert.ToString(e2);
}
}
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
double o = 0.0; double LL = double.Parse(textBox2.Text); double L0 = 0.0;
if (comboBox1.Text == "6度带")
{
o = Math.Floor(LL / 6.0) + 1;
L0 = 6 * o - 3;
textBox6.Text = Convert.ToString(o);
textBox3.Text = Convert.ToString(L0);
}
if (comboBox1.Text == "3度带")
{
o = LL / 3.0;
o = Math.Round(o, 0);
L0 = 3 * o;
textBox6.Text = Convert.ToString(o);
textBox3.Text = Convert.ToString(L0);
}
}
private void label9_Click(object sender, EventArgs e)
{
}
}
}
仅为正算，正反算请联系博主，谢谢。