/// <summary>
/// Assignes selected projection and displays results
/// </summary>
public bool Assign(string filename, MapWinGIS.GeoProjection proj)
{
MapWinGIS.GeoProjection projWGS84 = new MapWinGIS.GeoProjection();
if (!projWGS84.ImportFromEPSG(4326))
{
MessageBox.Show("Failed to initialize WGS84 coordinate system.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return(false);
}
bool sameProj = proj.get_IsSame(projWGS84);
int count = 0;
bool success = false;
int rowIndex = dgv.Rows.Add();
m_shapefile = new MapWinGIS.Shapefile();
if (m_shapefile.Open(filename, m_mapWin.Layers as MapWinGIS.ICallback))
{
this.Text = "Assigning projection: " + System.IO.Path.GetFileName(filename);
this.lblProjection.Text = "Projection: " + proj.Name;
// it will be faster to assing new instance of class
// as ImportFromEPSG() is slow according to GDAL documentation
m_shapefile.GeoProjection = proj;
if (!sameProj)
{
// we can't show preview on map without reprojection
if ((m_shapefile.StartEditingShapes(true, null)))
{
if (m_shapefile.ReprojectInPlace(projWGS84, ref count))
{
success = true;
}
}
}
else
{
success = true;
}
}
if (success)
{
this.AddShapefile(m_shapefile);
return(true);
}
else
{
// no success in reprojection
m_shapefile.Close();
return(false);
}
}