public override VectorElement BuildClusterElement(MapPos pos, VectorElementVector elements)
{
BalloonPopupStyle style = balloonPopupStyleBuilder.BuildStyle();
var popup = new BalloonPopup(pos, style, elements.Count.ToString(), "");
return popup;
}
public override VectorElement BuildClusterElement(MapPos pos, VectorElementVector elements)
{
BalloonPopupStyle style = balloonPopupStyleBuilder.BuildStyle();
var popup = new BalloonPopup(pos, style, elements.Count.ToString(), "");
return(popup);
}
private static void DrawPolygons()
{
MapEvent(null, new MapEventArgs(0, 100, "Calling polygons..."));
var polygons = d.getObjects(day, 3);
var overlayLayer = new VectorLayer(dataSourcePolygons);
overlayLayer.VisibleZoomRange = new MapRange(16, 24);
mapView.Layers.Add(overlayLayer);
VectorElementVector v = new VectorElementVector();
VectorElementVector vText = new VectorElementVector();
int i = 0;
foreach (var obj in polygons)
{
//Define coordinates of outer ring
MapPosVector polygonPoses = new MapPosVector();
foreach (var pnt in obj.polygonList.coordinates[0])
{
polygonPoses.Add(projection.FromWgs84(new MapPos(pnt[0], pnt[1])));
}
Polygon polygon = new Polygon(polygonPoses, Styles.GetDefaultPolygonStyle().BuildStyle());
v.Add(polygon);
if (i == 0)
{
mapView.FocusPos = projection.FromWgs84(new MapPos(obj.polygonList.coordinates[0][0][0], obj.polygonList.coordinates[0][0][1]));
}
MapEvent(null, new MapEventArgs(i, polygons.Count, "Drawing polygons..."));
i++;
}
dataSourcePolygons.RemoveAll(dataSourcePolygons.GetAll());
dataSourcePolygons.AddAll(v);
}
protected override void OnCreate(Android.OS.Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
AddOnlineBaseLayer(CartoBaseMapStyle.CartoBasemapStylePositron);
// read json from assets and add to map
string json;
using (System.IO.StreamReader sr = new System.IO.StreamReader(Assets.Open("cities15000.geojson")))
{
json = sr.ReadToEnd();
}
// Initialize a local vector data source
LocalVectorDataSource source = new LocalVectorDataSource(BaseProjection);
// Initialize a vector layer with the previous data source
ClusteredVectorLayer layer = new ClusteredVectorLayer(source, new MyClusterElementBuilder(this));
layer.MinimumClusterDistance = 50;
new System.Threading.Thread((obj) =>
{
// Create a basic style, as the ClusterElementBuilder will set the real style
var markerStyleBuilder = new MarkerStyleBuilder();
markerStyleBuilder.Size = 14;
MarkerStyle style = markerStyleBuilder.BuildStyle();
// Read GeoJSON, parse it using SDK GeoJSON parser
GeoJSONGeometryReader reader = new GeoJSONGeometryReader();
// Set target projection to base (mercator)
reader.TargetProjection = BaseProjection;
Alert("Starting load from .geojson");
// Read features from local asset
FeatureCollection features = reader.ReadFeatureCollection(json);
Alert("Finished load from .geojson");
VectorElementVector elements = new VectorElementVector();
for (int i = 0; i < features.FeatureCount; i++)
{
// This data set features point geometry,
// however, it can also be LineGeometry or PolygonGeometry
PointGeometry geometry = (PointGeometry)features.GetFeature(i).Geometry;
elements.Add(new Marker(geometry, style));
}
source.AddAll(elements);
Alert("Clustering started. Please wait...");
// Add the clustered vector layer to the map
MapView.Layers.Add(layer);
}).Start();
}
public override VectorData LoadElements(CullState cullState)
{
VectorElementVector elements = new VectorElementVector();
MapEnvelope mapViewBounds = cullState.GetProjectionEnvelope(this.Projection);
MapPos min = mapViewBounds.Bounds.Min;
MapPos max = mapViewBounds.Bounds.Max;
// Run query here
LoadData(elements, min, max, cullState.ViewState.Zoom);
return(new VectorData(elements));
}
public override void ViewDidAppear(bool animated)
{
base.ViewDidAppear(animated);
// Add default base layer
AddOnlineBaseLayer(CartoBaseMapStyle.CartoBasemapStylePositron);
// Initialize a local vector data source
LocalVectorDataSource source = new LocalVectorDataSource(BaseProjection);
// Initialize a vector layer with the previous data source
var layer = new ClusteredVectorLayer(source, new MyClusterElementBuilder());
// Default is 100. A good value depends on data
layer.MinimumClusterDistance = 50;
// read json from assets and add to map
string json = System.IO.File.ReadAllText(AssetUtils.CalculateResourcePath("cities15000.geojson"));
// Create a basic style, as the ClusterElementBuilder will set the real style
var markerStyleBuilder = new MarkerStyleBuilder();
markerStyleBuilder.Size = 14;
MarkerStyle style = markerStyleBuilder.BuildStyle();
// Read GeoJSON, parse it using SDK GeoJSON parser
GeoJSONGeometryReader reader = new GeoJSONGeometryReader();
// Set target projection to base (mercator)
reader.TargetProjection = BaseProjection;
// Read features from local asset
FeatureCollection features = reader.ReadFeatureCollection(json);
VectorElementVector elements = new VectorElementVector();
for (int i = 0; i < features.FeatureCount; i++)
{
// This data set features point geometry,
// however, it can also be LineGeometry or PolygonGeometry
PointGeometry geometry = (PointGeometry)features.GetFeature(i).Geometry;
elements.Add(new Marker(geometry, style));
}
// Add the clustered vector layer to the map
source.AddAll(elements);
MapView.Layers.Add(layer);
}
private static void DrawTrunks()
{
MapEvent(null, new MapEventArgs(0, 100, "Calling type trunk..."));
var trunks = d.getObjects(day, 2, 557);
var overlayLayer = new VectorLayer(dataSourceTrunks);
overlayLayer.VisibleZoomRange = new MapRange(6, 24);
mapView.Layers.Add(overlayLayer);
var overlayLayer2 = new VectorLayer(dataSourceTrunks2);
overlayLayer2.VisibleZoomRange = new MapRange(9, 24);
mapView.Layers.Add(overlayLayer2);
var overlayLayerText = new VectorLayer(dataSourceTrunksText);
overlayLayerText.VisibleZoomRange = new MapRange(17, 24);
mapView.Layers.Add(overlayLayerText);
VectorElementVector v = new VectorElementVector();
VectorElementVector v2 = new VectorElementVector();
VectorElementVector vText = new VectorElementVector();
mapView.FocusPos = projection.FromWgs84(new MapPos(trunks[0].lineList.coordinates[0][0], trunks[0].lineList.coordinates[0][1]));
int i = 0;
foreach (var obj in trunks)
{
var linePoses = new MapPosVector();
foreach (var pnt in obj.lineList.coordinates)
{
linePoses.Add(projection.FromWgs84(new MapPos(pnt[0], pnt[1])));
}
var line = new Line(linePoses, Styles.GetTrunkStyle1().BuildStyle());
v.Add(line);
var line2 = new Line(linePoses, Styles.GetTrunkStyle2().BuildStyle());
v2.Add(line2);
var textpopup1 = new Text(projection.FromWgs84(new MapPos(obj.lineList.coordinates[0][0], obj.lineList.coordinates[0][1])),
Styles.GetDefaultTextStyle().BuildStyle(),
obj.name);
vText.Add(textpopup1);
MapEvent(null, new MapEventArgs(i, trunks.Count, "Drawing type trunk..."));
i++;
}
dataSourceTrunks.RemoveAll(dataSourceTrunks.GetAll());
dataSourceTrunks.AddAll(v);
dataSourceTrunks2.RemoveAll(dataSourceTrunks2.GetAll());
dataSourceTrunks2.AddAll(v2);
dataSourceTrunksText.RemoveAll(dataSourceTrunksText.GetAll());
dataSourceTrunksText.AddAll(vText);
}
public override VectorElement BuildClusterElement(MapPos pos, VectorElementVector elements)
{
// Try to reuse existing marker styles
MarkerStyle style = null;
style = FindByKey(elements.Count);
if (elements.Count == 1)
{
style = ((Marker)elements[0]).Style;
}
if (style == null)
{
UIFont font = UIFont.FromName("Helvetica Neue", 10);
UIGraphics.BeginImageContext(markerImage.Size);
// Draw existing image on new image context;
markerImage.Draw(new CGPoint(0, 0));
NSString native = new NSString(elements.Count.ToString());
// Find the center location and draw text there
nfloat y = markerImage.Size.Height / 4;
CGRect rectangle = new CGRect(0, y, markerImage.Size.Width, markerImage.Size.Height);
native.DrawString(rectangle, font, UILineBreakMode.WordWrap, UITextAlignment.Center);
// Extract image
UIImage newImage = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
MarkerStyleBuilder styleBuilder = new MarkerStyleBuilder();
styleBuilder.Bitmap = BitmapUtils.CreateBitmapFromUIImage(newImage);
styleBuilder.Size = 30;
styleBuilder.PlacementPriority = elements.Count;
style = styleBuilder.BuildStyle();
markerStyles.Add(elements.Count, style);
}
// Create marker for the cluster
Marker marker = new Marker(pos, style);
return(marker);
}
private static void DrawPoints()
{
//MessageBox content to be rendered
MapEvent(null, new MapEventArgs(0, 100, "Calling points"));
//Objects are pulled from SQLite database
var points = d.getObjects(day, 1);
//Layers and the ZoomLevels where they should be visible are created (Zoomlevels range from 0 to 24)
var overlayLayer = new VectorLayer(dataSourcePoints);
overlayLayer.VisibleZoomRange = new MapRange(17, 24);
mapView.Layers.Add(overlayLayer);
var overlayLayerText = new VectorLayer(dataSourcePointsText);
overlayLayerText.VisibleZoomRange = new MapRange(17, 24);
mapView.Layers.Add(overlayLayerText);
VectorElementVector v = new VectorElementVector();
VectorElementVector vText = new VectorElementVector();
mapView.FocusPos = projection.FromWgs84(new MapPos(points[0].pointList.coordinates[0],
points[0].pointList.coordinates[1]));
int i = 0;
//Objects are drawn on layer
foreach (var obj in points)
{
if (i > 500)
{
continue;
}
var pt = new Point(
projection.FromWgs84(new MapPos(obj.pointList.coordinates[0],
obj.pointList.coordinates[1])), Styles.GetDefaultPointStyle().BuildStyle());
v.Add(pt);
var textpopup1 = new Text(
projection.FromWgs84(new MapPos(obj.pointList.coordinates[0], obj.pointList.coordinates[1])),
Styles.GetDefaultTextStyle().BuildStyle(),
obj.name);
vText.Add(textpopup1);
MapEvent(null, new MapEventArgs(i, points.Count, "Drawing points"));
i++;
}
//Layers are cleared of old data and written with new data
dataSourcePoints.RemoveAll(dataSourcePoints.GetAll());
dataSourcePoints.AddAll(v);
dataSourcePointsText.RemoveAll(dataSourcePointsText.GetAll());
dataSourcePointsText.AddAll(vText);
}
private static void DrawForests()
{
MapEvent(null, new MapEventArgs(0, 100, "Calling type landuse forest ..."));
var forests = d.getObjects(day, 3, 472);
var overlayLayer = new VectorLayer(dataSourceForests);
overlayLayer.VisibleZoomRange = new MapRange(6, 24);
mapView.Layers.Add(overlayLayer);
var overlayLayerText = new VectorLayer(dataSourceForestsText);
overlayLayerText.VisibleZoomRange = new MapRange(17, 24);
mapView.Layers.Add(overlayLayerText);
VectorElementVector v = new VectorElementVector();
VectorElementVector vText = new VectorElementVector();
int i = 0;
foreach (var obj in forests)
{
//Define coordinates of outer ring
MapPosVector polygonPoses = new MapPosVector();
foreach (var pnt in obj.polygonList.coordinates[0])
{
polygonPoses.Add(projection.FromWgs84(new MapPos(pnt[0], pnt[1])));
}
Polygon polygon = new Polygon(polygonPoses, Styles.GetDefaultForestStyle().BuildStyle());
//polygon.SetMetaDataElement("ClickText", obj.name);
v.Add(polygon);
if (i == 0)
{
mapView.FocusPos = projection.FromWgs84(new MapPos(obj.polygonList.coordinates[0][0][0], obj.polygonList.coordinates[0][0][1]));
}
var textpopup1 = new Text(projection.FromWgs84(new MapPos(obj.polygonList.coordinates[0][0][0], obj.polygonList.coordinates[0][0][1])),
Styles.GetDefaultTextStyle().BuildStyle(),
obj.name);
vText.Add(textpopup1);
MapEvent(null, new MapEventArgs(i, forests.Count, "Drawing Type landuse forest..."));
i++;
}
dataSourceForests.RemoveAll(dataSourceForests.GetAll());
dataSourceForests.AddAll(v);
dataSourceForestsText.RemoveAll(dataSourceForestsText.GetAll());
dataSourceForestsText.AddAll(vText);
}
private static void DrawRivers()
{
MapEvent(null, new MapEventArgs(0, 100, "Calling type waterway river..."));
var rivers = d.getObjects(day, 2, 744);
var overlayLayer = new VectorLayer(dataSourceRivers);
overlayLayer.VisibleZoomRange = new MapRange(9, 24);
mapView.Layers.Add(overlayLayer);
var overlayLayerText = new VectorLayer(dataSourceRiversText);
overlayLayerText.VisibleZoomRange = new MapRange(17, 24);
mapView.Layers.Add(overlayLayerText);
VectorElementVector v = new VectorElementVector();
VectorElementVector vText = new VectorElementVector();
int i = 0;
foreach (var obj in rivers)
{
var linePoses = new MapPosVector();
foreach (var pnt in obj.lineList.coordinates)
{
linePoses.Add(projection.FromWgs84(new MapPos(pnt[0], pnt[1])));
}
var line = new Line(linePoses, Styles.GetRiverStyle().BuildStyle());
v.Add(line);
if (i == 0)
{
mapView.FocusPos = projection.FromWgs84(new MapPos(obj.lineList.coordinates[0][0], obj.lineList.coordinates[0][1]));
}
var textpopup1 = new Text(projection.FromWgs84(new MapPos(obj.lineList.coordinates[0][0], obj.lineList.coordinates[0][1])),
Styles.GetDefaultTextStyle().BuildStyle(),
obj.name);
vText.Add(textpopup1);
MapEvent(null, new MapEventArgs(i, rivers.Count, "Drawing type waterway river..."));
i++;
}
dataSourceRivers.RemoveAll(dataSourceRivers.GetAll());
dataSourceRivers.AddAll(v);
dataSourceRiversText.RemoveAll(dataSourceRiversText.GetAll());
dataSourceRiversText.AddAll(vText);
}
void LoadData(VectorElementVector elements, MapPos min, MapPos max, float zoom)
{
// Load and parse JSON
string bbox = EncodeBBox(min.X, min.Y, max.X, max.Y);
string unencoded = query.Replace("!bbox!", bbox);
unencoded = unencoded.Replace("zoom('!scale_denominator!')", Convert.ToString(zoom));
// UrlEncode does not replace parentheses by default as they are valid url elements
string encoded = System.Web.HttpUtility.UrlEncode(unencoded).EncodeParenthesis();
string fullPath = baseUrl + "?format=GeoJSON&q=" + encoded;
try
{
string json = GetString(fullPath);
GeoJSONGeometryReader geoJsonParser = new GeoJSONGeometryReader();
FeatureCollection features = geoJsonParser.ReadFeatureCollection(json);
for (int i = 0; i < features.FeatureCount; i++)
{
Geometry geom = features.GetFeature(i).Geometry;
Variant props = features.GetFeature(i).Properties;
// Create object based on given style
VectorElement element;
if (style is PointStyle)
{
element = new Point((PointGeometry)geom, (PointStyle)style);
}
else if (style is MarkerStyle)
{
element = new Marker(geom, (MarkerStyle)style);
}
else if (style is LineStyle)
{
element = new Line((LineGeometry)geom, (LineStyle)style);
}
else if (style is PolygonStyle)
{
element = new Polygon((PolygonGeometry)geom, (PolygonStyle)style);
}
else
{
string text = "Object creation not implemented yet for style: " + style.SwigGetClassNameStyle();
Carto.Utils.Log.Debug(text);
break;
}
// Add all properties as MetaData, so you can use it with click handling
for (int j = 0; j < props.ObjectKeys.Count; j++)
{
var key = props.ObjectKeys[j];
var val = props.GetObjectElement(key);
element.SetMetaDataElement(key, val);
}
elements.Add(element);
}
}
catch (Exception e)
{
Console.WriteLine("Exception: " + e.Message);
}
}
