public static ERDDAPSelectDatasetForm GetInstance()
 {
     if (_instance == null)
     {
         _instance = new ERDDAPSelectDatasetForm();
     }
     return(_instance);
 }
 private void OnFormClosed(object sender, FormClosedEventArgs e)
 {
     UnsetMap();
     _instance = null;
     _layersHandler.CurrentLayer -= OnCurrentLayer;
     _layersHandler = null;
     global.SaveFormSettings(this);
     MakeGridFromPoints.Cleanup();
 }