private void button1_Click(object sender, EventArgs e)
{
if (App.Map.NumLayers > 0)
{
MessageHelper.Info("Can't change projection when there are layers on the map.");
return;
}
var gp = new GeoProjection();
if (optDefinition.Checked)
{
if (string.IsNullOrWhiteSpace(txtDefinition.Text))
{
MessageHelper.Info("Projection string is empty");
return;
}
if (!gp.ImportFromAutoDetect(txtDefinition.Text))
{
MessageHelper.Info("Failed to identify projection");
return;
}
}
if (optEmpty.Checked)
{
// do nothing it's empty all right
}
if (optWellKnown.Checked)
{
if (cboWellKnown.SelectedIndex == 0)
{
gp.SetWgs84();
}
if (cboWellKnown.SelectedIndex == 1)
{
gp.SetGoogleMercator();
}
}
App.Map.GeoProjection = gp;
App.Map.Redraw();
DialogResult = DialogResult.OK;
}
// <summary>
// Some operaions with GeoProjection object
// </summary>
public void GeoProjection(AxMap axMap1)
{
GeoProjection proj = new GeoProjection();
// EPSG code
proj.ImportFromEPSG(4326); // WGS84
// proj 4 string
proj.ImportFromProj4("+proj=longlat +datum=WGS84 +no_defs"); // WGS84
// autodetect the format
string unknown_format = "4326";
proj.ImportFromAutoDetect(unknown_format);
// from file
string filename = "some_name";
proj.ReadFromFile(filename);
// show the name of the loaded projection
Debug.Print("Projection loaded: " + proj.Name);
// show proj 4 representation
Debug.Print("Proj4 representation: " + proj.ExportToProj4());
// let's show the properties of the geographic projection
string s = "";
double[] arr = new double[5];
for (int i = 0; i < 5; i++)
{
// extract the parameter in element of val arr
proj.get_GeogCSParam((tkGeogCSParameter)i, ref arr[i]);
// append the name of parameter and the value to the string
s += (tkGeogCSParameter)i + ": " + arr[i] + Environment.NewLine;
}
MessageBox.Show("Parameters of geographic coordinate system: " + Environment.NewLine + s);
}
public bool ImportFromAutoDetect(string proj)
{
return(_projection.ImportFromAutoDetect(proj));
}
