/// <summary>
/// 墨卡托转经纬度
/// </summary>
/// <param name="mercator"></param>
/// <returns></returns>
public static MapPoint Mercator2LonLat(MapPoint mercator)
{
MapPoint lonLat = new MapPoint();
double x = mercator.X / 20037508.34 * 180;
double y = mercator.Y / 20037508.34 * 180;
y = 180 / Math.PI * (2 * Math.Atan(Math.Exp(y * Math.PI / 180)) - Math.PI / 2);
lonLat.X = x;
lonLat.Y = y;
return lonLat;
}
/// <summary>
/// 经纬度转墨卡托
/// </summary>
/// <param name="lonLat"></param>
/// <returns></returns>
public static MapPoint LonLat2Mercator(MapPoint lonLat)
{
MapPoint mercator = new MapPoint();
double x = lonLat.X * 20037508.34 / 180;
double y = Math.Log(Math.Tan((90 + lonLat.Y) * Math.PI / 360)) / (Math.PI / 180);
y = y * 20037508.34 / 180;
mercator.X = x;
mercator.Y = y;
return mercator;
}
/// <summary>
/// 下载
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnDownload_Click(object sender, EventArgs e)
{
if (string.IsNullOrEmpty(txtSaveFolder.Text))
{
MessageBox.Show("保存路径不能为空");
btnSaveFolder.Focus();
return;
}
if (!Util.Validation.IsNumber(txtMinLongitude.Text) || !Util.Validation.IsNumber(txtMaxLongitude.Text) ||
!Util.Validation.IsNumber(txtMinLatitude.Text) || !Util.Validation.IsNumber(txtMaxLatitude.Text))
{
MessageBox.Show("坐标格式不正确");
return;
}
PureProjection proj = mapControl.MapProvider.Projection;
int zoom = Convert.ToInt32(mapControl.Zoom);
GSize minOfTiles = proj.GetTileMatrixMinXY(zoom);
GSize maxOfTiles = proj.GetTileMatrixMaxXY(zoom);
PointLatLng position = new PointLatLng(double.Parse(txtMinLatitude.Text), double.Parse(txtMinLongitude.Text));
PointLatLng position1 = new PointLatLng(double.Parse(txtMaxLatitude.Text), double.Parse(txtMaxLongitude.Text));
Core.MapPoint minPoint = new Core.MapPoint()
{
X = position.Lng, Y = position.Lat
};
Core.MapPoint maxPoint = new Core.MapPoint()
{
X = position1.Lng, Y = position1.Lat
};
Core.Log.Clear(logFile);
downloader = new Core.Provider.GoogleChinaMapDownloader(
new Core.Extent(minPoint.X, minPoint.Y, maxPoint.X, maxPoint.Y),
int.Parse(txtMinZoom.Text),
int.Parse(txtMaxZoom.Text)
)
{
SavePath = txtSaveFolder.Text
};
downloader.TileDownloadCompleted += TileDownloadCompleted;
downloader.DownloadCompleted += DownloadCompleted;
downloader.BeginDownload();
statusbar_progress.Visible = true;
statusbar_progress.Maximum = 100;
statusbar_status.Text = "下载中......";
}
/// <summary>
/// 下载
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnDownload_Click(object sender, EventArgs e)
{
if (string.IsNullOrEmpty(txtSaveFolder.Text))
{
MessageBox.Show("保存路径不能为空");
btnSaveFolder.Focus();
return;
}
if (!Util.Validation.IsNumber(txtMinLongitude.Text) || !Util.Validation.IsNumber(txtMaxLongitude.Text)
|| !Util.Validation.IsNumber(txtMinLatitude.Text) || !Util.Validation.IsNumber(txtMaxLatitude.Text))
{
MessageBox.Show("坐标格式不正确");
return;
}
PureProjection proj = mapControl.MapProvider.Projection;
int zoom = Convert.ToInt32(mapControl.Zoom);
GSize minOfTiles = proj.GetTileMatrixMinXY(zoom);
GSize maxOfTiles = proj.GetTileMatrixMaxXY(zoom);
PointLatLng position = new PointLatLng(double.Parse(txtMinLatitude.Text), double.Parse(txtMinLongitude.Text));
PointLatLng position1 = new PointLatLng(double.Parse(txtMaxLatitude.Text), double.Parse(txtMaxLongitude.Text));
Core.MapPoint minPoint = new Core.MapPoint() { X = position.Lng, Y = position.Lat };
Core.MapPoint maxPoint = new Core.MapPoint() { X = position1.Lng, Y = position1.Lat };
Core.Log.Clear(logFile);
downloader = new Core.Provider.GoogleChinaMapDownloader(
new Core.Extent(minPoint.X, minPoint.Y, maxPoint.X, maxPoint.Y),
int.Parse(txtMinZoom.Text),
int.Parse(txtMaxZoom.Text)
)
{
SavePath = txtSaveFolder.Text
};
downloader.TileDownloadCompleted += TileDownloadCompleted;
downloader.DownloadCompleted += DownloadCompleted;
downloader.BeginDownload();
statusbar_progress.Visible = true;
statusbar_progress.Maximum = 100;
statusbar_status.Text = "下载中......";
}