// Draw and densify a user defined polygon
private async void DensifyButton_Click(object sender, RoutedEventArgs e)
{
try
{
resultsPanel.Visibility = Visibility.Collapsed;
inputGraphics.Graphics.Clear();
resultGraphics.Graphics.Clear();
// Request polygon or polyline from the user
DrawShape drawShape = (DrawShape)comboShapeType.SelectedItem;
var original = await mapView.Editor.RequestShapeAsync(drawShape, _fillSymbol);
// Add original shape vertices to input graphics layer
var coordsOriginal = ((IEnumerable <CoordinateCollection>)original).First();
foreach (var coord in coordsOriginal)
{
inputGraphics.Graphics.Add(new Graphic(new MapPoint(coord, original.SpatialReference), _origVertexSymbol));
}
// Densify the shape
var densify = GeometryEngine.GeodesicDensify(original, mapView.Extent.Width / 100, LinearUnits.Meters);
inputGraphics.Graphics.Add(new Graphic(densify, _fillSymbol));
// Add new vertices to result graphics layer
var coordsDensify = ((IEnumerable <CoordinateCollection>)densify).First();
foreach (var coord in coordsDensify)
{
resultGraphics.Graphics.Add(new Graphic(new MapPoint(coord, original.SpatialReference), _newVertexSymbol));
}
// Results
Dictionary <string, object> results = new Dictionary <string, object>();
results["Length"] = GeometryEngine.GeodesicLength(densify) * METERS_TO_MILES;
if (original is Polygon)
{
results["Area"] = GeometryEngine.GeodesicArea(densify) * SQUARE_METERS_TO_MILES;
}
else
{
results["Area"] = "N/A";
}
results["Vertices Before"] = coordsOriginal.Count();
results["Vertices After"] = coordsDensify.Count();
resultsListView.ItemsSource = results;
resultsPanel.Visibility = Visibility.Visible;
}
catch (TaskCanceledException)
{
}
catch (Exception ex)
{
MessageBox.Show("Densify Error: " + ex.Message, "Geodesic Densify Sample");
}
}
// Draw and densify a user defined polygon
private async void DensifyButton_Click(object sender, RoutedEventArgs e)
{
try
{
resultsPanel.Visibility = Visibility.Collapsed;
_inputGraphics.Graphics.Clear();
_resultGraphics.Graphics.Clear();
// Request polygon or polyline from the user
DrawShape drawShape = (DrawShape)comboShapeType.SelectedValue;
var original = await mapView.Editor.RequestShapeAsync(drawShape, _fillSymbol);
// Add original shape vertices to input graphics layer
var coordsOriginal = ((IEnumerable <CoordinateCollection>)original).First();
foreach (var coord in coordsOriginal)
{
_inputGraphics.Graphics.Add(new Graphic(new MapPoint(coord, original.SpatialReference), _origVertexSymbol));
}
// Densify the shape
var densify = GeometryEngine.GeodesicDensify(original, mapView.Extent.Width / 100, LinearUnits.Meters);
_inputGraphics.Graphics.Add(new Graphic(densify, _fillSymbol));
// Add new vertices to result graphics layer
var coordsDensify = ((IEnumerable <CoordinateCollection>)densify).First();
foreach (var coord in coordsDensify)
{
_resultGraphics.Graphics.Add(new Graphic(new MapPoint(coord, original.SpatialReference), _newVertexSymbol));
}
// Results
var results = new List <Tuple <string, object> >()
{
new Tuple <string, object>("Length", GeometryEngine.GeodesicLength(densify) * METERS_TO_MILES),
new Tuple <string, object>("Area",
(original is Polygon) ? (GeometryEngine.GeodesicArea(densify) * SQUARE_METERS_TO_MILES).ToString("0.000") : "N/A"),
new Tuple <string, object>("Vertices Before", coordsOriginal.Count()),
new Tuple <string, object>("Vertices After", coordsDensify.Count())
};
resultsListView.ItemsSource = results;
resultsPanel.Visibility = Visibility.Visible;
}
catch (TaskCanceledException)
{
}
catch (Exception ex)
{
var _ = new MessageDialog("Densify Error: " + ex.Message, "Sample Error").ShowAsync();
}
}
// Draw and densify a user defined polygon
private async void DensifyButton_Click(object sender, RoutedEventArgs e)
{
try
{
resultsPanel.Visibility = Visibility.Collapsed;
_inputOverlay.Graphics.Clear();
_resultsOverlay.Graphics.Clear();
// Request polygon or polyline from the user
DrawShape drawShape = (DrawShape)comboShapeType.SelectedValue;
// Use polyline as default
Symbol symbolToUse = _lineSymbol;
if (drawShape == DrawShape.Polygon)
{
symbolToUse = _fillSymbol;
}
var original = await MyMapView.Editor.RequestShapeAsync(drawShape, symbolToUse);
// Account for WrapAround
var normalized = GeometryEngine.NormalizeCentralMeridian(original);
// Add original shape vertices to input graphics layer
var coordsOriginal = (normalized as Multipart).Parts.First().GetPoints();
foreach (var mapPoint in coordsOriginal)
{
_inputOverlay.Graphics.Add(new Graphic(mapPoint, _origVertexSymbol));
}
// Get current viewpoints extent from the MapView
var currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
var viewpointExtent = currentViewpoint.TargetGeometry.Extent;
// Densify the shape
var densify = GeometryEngine.GeodesicDensify(normalized, viewpointExtent.Width / 100, LinearUnits.Meters);
if (densify.GeometryType == GeometryType.Polygon)
{
_inputOverlay.Graphics.Add(new Graphic(densify, _fillSymbol));
}
else
{
_inputOverlay.Graphics.Add(new Graphic(densify, _lineSymbol));
}
// Add new vertices to result graphics layer
var coordsDensify = (densify as Multipart).Parts.First().GetPoints();
foreach (var mapPoint in coordsDensify)
{
_resultsOverlay.Graphics.Add(new Graphic(mapPoint, _newVertexSymbol));
}
// Results
Dictionary <string, object> results = new Dictionary <string, object>();
results["Length"] = GeometryEngine.GeodesicLength(densify) * METERS_TO_MILES;
if (normalized is Polygon)
{
results["Area"] = GeometryEngine.GeodesicArea(densify) * SQUARE_METERS_TO_MILES;
}
else
{
results["Area"] = "N/A";
}
results["Vertices Before"] = coordsOriginal.Count();
results["Vertices After"] = coordsDensify.Count();
resultsListView.ItemsSource = results;
resultsPanel.Visibility = Visibility.Visible;
}
catch (TaskCanceledException) { }
catch (Exception ex)
{
MessageBox.Show("Densify Error: " + ex.Message, "Geodesic Densify Sample");
}
}
// Draw and densify a user defined polygon
private async void DensifyButton_Click(object sender, RoutedEventArgs e)
{
try
{
DensifyButton.IsEnabled = false;
resultsPanel.Visibility = Visibility.Collapsed;
_inputOverlay.Graphics.Clear();
_resultsOverlay.Graphics.Clear();
DrawShape drawShape;
drawShape = (RadioPolyline.IsChecked.Value) ? drawShape = DrawShape.Polyline : drawShape = DrawShape.Polygon;
// Use polyline as default
Symbol symbolToUse = _lineSymbol;
if (drawShape == DrawShape.Polygon)
{
symbolToUse = _fillSymbol;
}
var original = await MyMapView.Editor.RequestShapeAsync(drawShape, symbolToUse);
// Account for WrapAround
var normalized = GeometryEngine.NormalizeCentralMeridian(original);
// Add original shape vertices to input graphics layer
var coordsOriginal = (normalized as Multipart).Parts.First().GetPoints();
foreach (var coord in coordsOriginal)
{
_inputOverlay.Graphics.Add(new Graphic(coord, _origVertexSymbol));
}
// Get current viewpoints extent from the MapView
var currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
var viewpointExtent = currentViewpoint.TargetGeometry.Extent;
// Densify the shape
var densify = GeometryEngine.GeodesicDensify(normalized, viewpointExtent.Width / 100, LinearUnits.Meters);
if (densify.GeometryType == GeometryType.Polygon)
{
_inputOverlay.Graphics.Add(new Graphic(densify, _fillSymbol));
}
else
{
_inputOverlay.Graphics.Add(new Graphic(densify, _lineSymbol));
}
// Add new vertices to result graphics layer
var coordsDensify = (densify as Multipart).Parts.First().GetPoints();
foreach (var coord in coordsDensify)
{
_resultsOverlay.Graphics.Add(new Graphic(coord, _newVertexSymbol));
}
// Results
var results = new List <Tuple <string, object> >()
{
new Tuple <string, object>("Length", GeometryEngine.GeodesicLength(densify) * METERS_TO_MILES),
new Tuple <string, object>("Area",
(normalized is Polygon) ? (GeometryEngine.GeodesicArea(densify) * SQUARE_METERS_TO_MILES).ToString("0.000") : "N/A"),
new Tuple <string, object>("Vertices Before", coordsOriginal.Count()),
new Tuple <string, object>("Vertices After", coordsDensify.Count())
};
resultsListView.ItemsSource = results;
resultsPanel.Visibility = Visibility.Visible;
}
catch (TaskCanceledException) { }
catch (Exception ex)
{
var _x = new MessageDialog("Densify Error: " + ex.Message, "Sample Error").ShowAsync();
}
finally
{
DensifyButton.IsEnabled = true;
}
}