private void HandleStyleLoaded(MapStyle obj)
{
map.Functions.AddSource(new VectorSource(
"ethnicity-source",
"http://api.mapbox.com/v4/examples.8fgz4egr.json?access_token=" + MapBoxService.AccessToken
));
var circleLayer = new CircleLayer("population", "ethnicity-source")
{
SourceLayer = "sf2010",
CircleRadius =
Expression.Interpolate(
Expression.Exponential(1.75f),
Expression.Zoom(),
Expression.CreateStop(12f, 2f),
Expression.CreateStop(22f, 180f)
),
CircleColor =
Expression.Match(
Expression.Get("ethnicity"), Expression.Rgb(0f, 0f, 0f),
Expression.CreateStop("white", Expression.Rgb(251f, 176f, 59f)),
Expression.CreateStop("Black", Expression.Rgb(34f, 59f, 83f)),
Expression.CreateStop("Hispanic", Expression.Rgb(229f, 94f, 94f)),
Expression.CreateStop("Asian", Expression.Rgb(59f, 178f, 208f)),
Expression.CreateStop("Other", Expression.Rgb(204f, 204f, 204f)))
};
map.Functions.AddLayer(circleLayer);
}
private void HandleStyleLoaded(MapStyle obj)
{
map.Functions.AddSource(
// Point to GeoJSON data. This example visualizes all M1.0+ earthquakes from
// 12/22/15 to 1/21/16 as logged by USGS' Earthquake hazards program.
new GeoJsonSource("earthquakes",
"https://www.mapbox.com/mapbox-gl-js/assets/earthquakes.geojson")
{
Options = new GeoJsonOptions()
{
Cluster = (true),
ClusterMaxZoom = (15), // Max zoom to cluster points on
ClusterRadius = (20), // Use small cluster radius for the hotspots look
}
}
);
// Use the earthquakes source to create four layers:
// three for each cluster category, and one for unclustered points
// Each point range gets a different fill color.
var layers = new KeyValuePair <int, Color>[] {
new KeyValuePair <int, Color> (150, Color.FromHex("#E55E5E")),
new KeyValuePair <int, Color>(20, Color.FromHex("#F9886C")),
new KeyValuePair <int, Color>(0, Color.FromHex("#FBB03B"))
};
CircleLayer unclustered = new CircleLayer("unclustered-points", "earthquakes")
{
CircleColor = Color.FromHex("#FBB03B"),
CircleRadius = 20f,
CircleBlur = 1f,
Filter = Expression.Neq(Expression.Get("cluster"), Expression.Literal(true))
};
map.Functions.AddLayerBelow(unclustered, "building");
for (int i = 0; i < layers.Length; i++)
{
var pointCount = Expression.ToNumber(Expression.Get("point_count"));
var circles = new CircleLayer("cluster-" + i, "earthquakes")
{
CircleColor = layers[i].Value,
CircleRadius = 70f,
CircleBlur = 1f,
Filter = i == 0
? Expression.Gte(pointCount, Expression.Literal(layers[i].Key))
: Expression.All(
Expression.Gte(pointCount, Expression.Literal(layers[i].Key)),
Expression.Lt(pointCount, Expression.Literal(layers[i - 1].Key))
)
};
map.Functions.AddLayerBelow(circles, "building");
}
}
private void AddPointsLayer()
{
// Create and style a CircleLayer that uses the Point Features' coordinates in the GeoJSON data
CircleLayer individualCirclesLayer = new CircleLayer("points", GEOJSON_SOURCE_ID)
{
CircleColor = Color.Yellow,
CircleRadius = 3f,
Filter = Expression.Eq(Expression.Literal("$type"), Expression.Literal("Point"))
};
map.Functions.AddLayer(individualCirclesLayer);
}
private void AddCircleLayer()
{
CircleLayer circleLayer = new CircleLayer(CIRCLE_LAYER_ID, EARTHQUAKE_SOURCE_ID)
{
// Size circle radius by earthquake magnitude and zoom level
CircleRadius =
Expression.Interpolate(
Expression.Linear(), Expression.Zoom(),
Expression.Literal(7), Expression.Interpolate(
Expression.Linear(), Expression.Get("mag"),
Expression.CreateStop(1, 1),
Expression.CreateStop(6, 4)
),
Expression.Literal(16), Expression.Interpolate(
Expression.Linear(), Expression.Get("mag"),
Expression.CreateStop(1, 5),
Expression.CreateStop(6, 50)
)
)
,
// Color circle by earthquake magnitude
CircleColor = (
Expression.Interpolate(
Expression.Linear(), Expression.Get("mag"),
Expression.Literal(1), Expression.Rgba(33, 102, 172, 0),
Expression.Literal(2), Expression.Rgb(103, 169, 207),
Expression.Literal(3), Expression.Rgb(209, 229, 240),
Expression.Literal(4), Expression.Rgb(253, 219, 199),
Expression.Literal(5), Expression.Rgb(239, 138, 98),
Expression.Literal(6), Expression.Rgb(178, 24, 43)
)
),
// Transition from heatmap to circle layer by zoom level
CircleOpacity =
Expression.Interpolate(
Expression.Linear(), Expression.Zoom(),
Expression.CreateStop(7, 0),
Expression.CreateStop(8, 1)
)
,
CircleStrokeColor = "white",
CircleStrokeWidth = 1.0f
};
map.Functions.AddLayerBelow(circleLayer, HEATMAP_LAYER_ID);
}
private void HandleStyleLoaded(MapStyle obj)
{
var source = new VectorSource("museums_source", "mapbox://mapbox.2opop9hr");
map.Functions.AddSource(source);
museumsLayer = new CircleLayer("museums", "museums_source")
{
SourceLayer = "museum-cusco",
Visibility = Expression.Visibility(true),
CircleRadius = 8,
CircleColor = Expression.Rgb(55, 148, 179)
};
map.Functions.AddLayer(museumsLayer);
}
public static Sdk.Style.Layers.CircleLayer ToNative(this CircleLayer layer)
{
if (layer == null)
{
return(null);
}
var native = new Sdk.Style.Layers.CircleLayer(layer.Id.Prefix(), layer.SourceId.Prefix());
native.SetProperties(
Sdk.Style.Layers.PropertyFactory.CircleColor(layer.CircleColor.ToAndroid()),
Sdk.Style.Layers.PropertyFactory.CircleOpacity(new Java.Lang.Float(layer.CircleOpacity)),
Sdk.Style.Layers.PropertyFactory.CircleRadius(new Java.Lang.Float(layer.CircleRadius))
);
return(native);
}
private void AddClusteredGeoJsonSource()
{
map.Functions.AddSource(
// Point to GeoJSON data. This example visualizes all M1.0+ earthquakes from
// 12/22/15 to 1/21/16 as logged by USGS' Earthquake hazards program.
new GeoJsonSource("earthquakes",
"https://www.mapbox.com/mapbox-gl-js/assets/earthquakes.geojson")
{
Options = new GeoJsonOptions
{
Cluster = (true),
ClusterMaxZoom = (14),
ClusterRadius = (50),
}
}
);
// Use the earthquakes GeoJSON source to create three layers: One layer for each cluster category.
// Each point range gets a different fill color.
var layers = new KeyValuePair <int, Color>[] {
new KeyValuePair <int, Color> (150, Color.FromHex("#f74e4e")),
new KeyValuePair <int, Color>(20, Color.FromHex("#f74e4e")),
new KeyValuePair <int, Color>(0, Color.FromHex("#f74e4e"))
};
//Creating a marker layer for single data points
SymbolLayer unclustered = new SymbolLayer("unclustered-points", "earthquakes")
{
IconImage = "cross-icon-id",
IconSize = Expression.Division(
Expression.Get("mag"), Expression.Literal(4.0f)
),
IconColor = Expression.Interpolate(
Expression.Exponential(1), Expression.Get("mag"),
Expression.CreateStop(2.0, Expression.Rgb(0, 255, 0)),
Expression.CreateStop(4.5, Expression.Rgb(0, 0, 255)),
Expression.CreateStop(7.0, Expression.Rgb(255, 0, 0)))
};
map.Functions.AddLayer(unclustered);
for (int i = 0; i < layers.Length; i++)
{
var pointCount = Expression.ToNumber(Expression.Get("point_count"));
//Add clusters' circles
var circles = new CircleLayer("cluster-" + i, "earthquakes")
{
CircleColor = layers[i].Value,
CircleRadius = 18f,
// Add a filter to the cluster layer that hides the circles based on "point_count"
Filter = i == 0
? Expression.All(Expression.Has("point_count"), Expression.Gte(pointCount, Expression.Literal(layers[i].Key)))
: Expression.All(Expression.Has("point_count"),
Expression.Gte(pointCount, Expression.Literal(layers[i].Key)),
Expression.Lt(pointCount, Expression.Literal(layers[i - 1].Key)))
};
map.Functions.AddLayer(circles);
}
//Add the count labels
SymbolLayer count = new SymbolLayer("count", "earthquakes")
{
TextField = Expression.ToString(Expression.Get("point_count")),
TextSize = 12f,
TextColor = Color.White,
TextIgnorePlacement = (true),
TextAllowOverlap = (true)
};
map.Functions.AddLayer(count);
}
