■ 지구상의 위도와 경도를 거리로 변환하기
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TestProject.zip▶ CityInfo.cs
using System.Text.RegularExpressions;
namespace TestProject { /// <summary> /// 도시 정보 /// </summary> public class CityInfo { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Public
#region Field
/// <summary> /// 명칭 /// </summary> public string Name;
/// <summary> /// 위도 /// </summary> public double Latitude;
/// <summary> /// 경도 /// </summary> public double Longitude;
#endregion
//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public
#region 생성자 - CityInfo(name, latitudeDegree, latitudeMinute, latitudeSecond, longitudeDegree, longitudeMinute, longitudeSecond)
/// <summary> /// 생성자 /// </summary> /// <param name="name">명칭</param> /// <param name="latitudeDegree">위도 도</param> /// <param name="latitudeMinute">위도 분</param> /// <param name="latitudeSecond">위도 초</param> /// <param name="longitudeDegree">경도 도</param> /// <param name="longitudeMinute">경도 분</param> /// <param name="longitudeSecond">경도 초</param> public CityInfo(string name, int latitudeDegree, int latitudeMinute, int latitudeSecond, int longitudeDegree, int longitudeMinute, int longitudeSecond) { Latitude = latitudeDegree + latitudeMinute / 60 + latitudeSecond / 3600; Longitude = longitudeDegree + longitudeMinute / 60 + longitudeSecond / 3600; }
#endregion #region 생성자 - CityInfo(name, latitudeDegree, latitudeMinute, longitudeDegree, longitudeMinute)
/// <summary> /// 생성자 /// </summary> /// <param name="name">명칭</param> /// <param name="latitudeDegree">위도 도</param> /// <param name="latitudeMinute">위도 분</param> /// <param name="longitudeDegree">경도 도</param> /// <param name="longitudeMinute">경도 분</param> public CityInfo(string name, int latitudeDegree, int latitudeMinute, int longitudeDegree, int longitudeMinute) : this(name, latitudeDegree, latitudeMinute, 0, longitudeDegree, longitudeMinute, 0) { }
#endregion #region 생성자 - CityInfo(text)
/// <summary> /// 생성자 /// </summary> /// <param name="text">텍스트</param> public CityInfo(string text) { Regex regex = new Regex(@"\d"); Match match = regex.Match(text);
int position = match.Index;
Name = text.Substring(0, position - 1).Trim();
text = text.Substring(position);
position = text.IndexOf('°');
double latitudeDegree = double.Parse(text.Substring(0, position));
text = text.Substring(position + 1);
position = text.IndexOf('′');
double latitudeMinute = double.Parse(text.Substring(0, position));
text = text.Substring(position + 1);
Latitude = latitudeDegree + latitudeMinute / 60;
if(text.Substring(0, 1).ToUpper() == "S") { Latitude = -Latitude; }
text = text.Substring(1).Trim();
position = text.IndexOf('°');
double longitudeDegree = double.Parse(text.Substring(0, position));
text = text.Substring(position + 1);
position = text.IndexOf('′');
double longitudeMinute = double.Parse(text.Substring(0, position));
text = text.Substring(position + 1);
Longitude = longitudeDegree + longitudeMinute / 60;
if(text.Substring(0, 1).ToUpper() == "E") { Longitude = -Longitude; } }
#endregion
//////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Public
#region 문자열 구하기 - ToString()
/// <summary> /// 문자열 구하기 /// </summary> /// <returns>문자열</returns> public override string ToString() { return Name; }
#endregion } }
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▶ MainForm.cs
using System; using System.Windows.Forms;
namespace TestProject { /// <summary> /// 메인 폼 /// </summary> public partial class MainForm : Form { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private
#region Field
/// <summary> /// 지구 반지름 (단위 : 마일) /// </summary> private const double EARTH_RADIUS = 3958.756;
/// <summary> /// 도시 정보 배열 /// </summary> private CityInfo[] cityInfoArray = { new CityInfo("Beijing 39°55′N 116°26′E"), new CityInfo("Berlin 52°32′N 13° 25′E"), new CityInfo("Cairo 30°03′N 31° 15′E"), new CityInfo("Canberra 35°17′S 149°08′E"),
new CityInfo("London 51°30′N 0° 10′W"), new CityInfo("Los Angeles 34°03′N 118°15′W"), new CityInfo("Mexico City 19°24′N 99° 09′W"), new CityInfo("Moscow 55°45′N 37° 42′E"), new CityInfo("Mumbai 18°56′N 74° 35′E"), new CityInfo("New York City 40°43′N 74° 00′W"), new CityInfo("Rio de Janeiro 22°54′S 43° 14′W"), new CityInfo("Rome 41°48′N 12° 36′E"), new CityInfo("San Diego 32°42′N 117°10′W"), new CityInfo("San Francisco 37°47′N 122°26′W"), new CityInfo("Tokyo 35°40′N 139°45′E"), };
#endregion
//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public
#region 생성자 - MainForm()
/// <summary> /// 생성자 /// </summary> public MainForm() { InitializeComponent();
#region 이벤트를 설정한다.
Load += Form_Load; this.cityFromComboBox.SelectedIndexChanged += cityFromComboBox_SelectedIndexChanged; this.cityToComboBox.SelectedIndexChanged += cityToComboBox_SelectedIndexChanged; this.calculateButton.Click += calculateButton_Click;
#endregion }
#endregion
//////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private //////////////////////////////////////////////////////////////////////////////// Event
#region 폼 로드시 처리하기 - Form_Load(sender, e)
/// <summary> /// 폼 로드시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void Form_Load(object sender, EventArgs e) { foreach(CityInfo cityInfo in this.cityInfoArray) { this.cityFromComboBox.Items.Add(cityInfo);
this.cityToComboBox.Items.Add(cityInfo); }
this.cityFromComboBox.SelectedIndex = 0; this.cityToComboBox.SelectedIndex = 1; }
#endregion #region 도시 FROM 콤보 박스 선택 인덱스 변경시 처리하기 - cityFromComboBox_SelectedIndexChanged(sender, e)
/// <summary> /// 도시 FROM 콤보 박스 선택 인덱스 변경시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void cityFromComboBox_SelectedIndexChanged(object sender, EventArgs e) { ComboBox comboBox = sender as ComboBox;
if(comboBox.SelectedItem == null) { return; }
CityInfo cityInfo = comboBox.SelectedItem as CityInfo;
this.latitudeFromTextBox.Text = cityInfo.Latitude.ToString("0.0000"); this.longitudeFromTextBox.Text = cityInfo.Longitude.ToString("0.0000"); }
#endregion #region 도시 TO 콤보 박스 선택 인덱스 변경시 처리하기 - cityToComboBox_SelectedIndexChanged(sender, e)
/// <summary> /// 도시 TO 콤보 박스 선택 인덱스 변경시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void cityToComboBox_SelectedIndexChanged(object sender, EventArgs e) { ComboBox comboBox = sender as ComboBox;
if(comboBox.SelectedItem == null) { return; }
CityInfo cityInfo = comboBox.SelectedItem as CityInfo;
this.latitudeToTextBox.Text = cityInfo.Latitude.ToString("0.0000"); this.longitudeToTextBox.Text = cityInfo.Longitude.ToString("0.0000"); }
#endregion #region 계산하기 버튼 클릭시 처리하기 - calculateButton_Click(sender, e)
/// <summary> /// 계산하기 버튼 클릭시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void calculateButton_Click(object sender, EventArgs e) { double latitudeFrom = double.Parse(this.latitudeFromTextBox.Text);
if(latitudeFrom < 0) { latitudeFrom += 360; }
double longitudeFrom = double.Parse(this.longitudeFromTextBox.Text);
if(longitudeFrom < 0) { longitudeFrom += 360; }
double latitudeTo = double.Parse(this.latitudeToTextBox.Text);
if(latitudeTo < 0) { latitudeTo += 360; }
double longitudeTo = double.Parse(this.longitudeToTextBox.Text);
if(longitudeTo < 0) { longitudeTo += 360; }
double differenceLatitude = Math.Abs(latitudeFrom - latitudeTo);
if(differenceLatitude > 180) { differenceLatitude = 360 - differenceLatitude; }
double differenceLongitude = Math.Abs(longitudeFrom - longitudeTo);
if(differenceLongitude > 180) { differenceLongitude = 360 - differenceLongitude; }
this.flatEarthTextBox.Text = CalculateFlatEarthMethod ( latitudeFrom, longitudeFrom, latitudeTo, longitudeTo ).ToString("0.0000");
this.haversineTextBox.Text = CalculateHaversineMethod ( latitudeFrom, longitudeFrom, latitudeTo, longitudeTo ).ToString("0.0000"); }
#endregion
//////////////////////////////////////////////////////////////////////////////// Function
#region 라디안 구하기 - GetRadian(degree)
/// <summary> /// 라디안 구하기 /// </summary> /// <param name="degree">도</param> /// <returns>라디안</returns> private double GetRadian(double degree) { return degree / 180 * Math.PI; }
#endregion #region 플랫 어스 방법으로 계산하기 - CalculateFlatEarthMethod(fromLatitude, fromLongitude, toLatitude, toLongitude)
/// <summary> /// 플랫 어스 방법으로 계산하기 /// </summary> /// <param name="fromLatitude">FROM 위도</param> /// <param name="fromLongitude">FROM 경로</param> /// <param name="toLatitude">TO 위도</param> /// <param name="toLongitude">TO 경로</param> /// <returns>플랫 어스 방법으로 계산한 값</returns> private double CalculateFlatEarthMethod(double fromLatitude, double fromLongitude, double toLatitude, double toLongitude) { double differenceLatitude = Math.Abs(fromLatitude - toLatitude);
if(differenceLatitude > 180) { differenceLatitude = 360 - differenceLatitude; }
double differenceLongitude = Math.Abs(fromLongitude - toLongitude);
if(differenceLongitude > 180) { differenceLongitude = 360 - differenceLongitude; }
double x = 69.1 * differenceLatitude; double y = 53.0 * differenceLongitude;
return Math.Sqrt(x * x + y * y); }
#endregion #region 하버사인 방법으로 계산하기 - CalculateHaversineMethod(fromLatitude, fromLongitude, toLatitude, toLongitude)
/// <summary> /// 하버사인 방법으로 계산하기 /// </summary> /// <param name="fromLatitude">FROM 위도</param> /// <param name="fromLongitude">FROM 경로</param> /// <param name="toLatitude">TO 위도</param> /// <param name="toLongitude">TO 경로</param> /// <returns>하버사인 방법으로 계산한 값</returns> private double CalculateHaversineMethod(double fromLatitude, double fromLongitude, double toLatitude, double toLongitude) { double differenceLatitude = GetRadian(toLatitude - fromLatitude ); double differenceLongitude = GetRadian(toLongitude - fromLongitude);
double a = Math.Sin(differenceLatitude / 2) * Math.Sin(differenceLatitude / 2) + Math.Cos(GetRadian(fromLatitude)) * Math.Cos(GetRadian(toLatitude)) * Math.Sin(differenceLongitude / 2) * Math.Sin(differenceLongitude / 2);
return 2 * Math.Atan2(Math.Sqrt(a), Math.Sqrt(1 - a)) * EARTH_RADIUS; }
#endregion } }
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