public static void PointsLabelingPlaced()
{
//ExStart: PointsLabelingPlaced
using (var map = new Map(500, 200))
{
var symbol = new SimpleMarker
{
FillColor = Color.LightGray,
StrokeStyle = StrokeStyle.None
};
var labeling = new SimpleLabeling(labelAttribute: "name")
{
HaloSize = 1,
Placement = new PointLabelPlacement
{
VerticalAnchorPoint = VerticalAnchor.Bottom,
HorizontalAnchorPoint = HorizontalAnchor.Left,
HorizontalOffset = 2,
VerticalOffset = 2,
Rotation = 10,
}
};
map.Add(VectorLayer.Open(dataDir + "points.geojson", Drivers.GeoJson), symbol, labeling);
map.Padding = 50;
map.Render(dataDir + "points_labeling_placed_out.svg", Renderers.Svg);
}
//ExEnd: PointsLabelingPlaced
}
public static void AddMapLayersAndStyles()
{
//ExStart: AddMapLayersAndStyles
using (var map = new Map(800, 476))
{
var baseMapSymbolizer = new SimpleFill {
FillColor = Color.Salmon, StrokeWidth = 0.75
};
map.Add(VectorLayer.Open(dataDir + "basemap.shp", Drivers.Shapefile), baseMapSymbolizer);
var citiesSymbolizer = new SimpleMarker()
{
FillColor = Color.LightBlue
};
citiesSymbolizer.FeatureBasedConfiguration = (feature, symbolizer) =>
{
var population = feature.GetValue <int>("population");
symbolizer.Size = 10 * population / 1000;
if (population < 2500)
{
symbolizer.FillColor = Color.GreenYellow;
}
};
map.Add(VectorLayer.Open(dataDir + "points.geojson", Drivers.GeoJson), citiesSymbolizer);
map.Render(dataDir + "cities_out.svg", Renderers.Svg);
}
//ExEnd: AddMapLayersAndStyles
}
public static void PointsLabelingStyled()
{
//ExStart: PointsLabelingStyled
using (var map = new Map(500, 200))
{
var symbol = new SimpleMarker
{
FillColor = Color.LightGray,
StrokeStyle = StrokeStyle.None
};
var labeling = new SimpleLabeling(labelAttribute: "name")
{
HaloSize = 2,
HaloColor = Color.LightGray,
FontSize = 15,
FontStyle = FontStyle.Italic,
};
map.Add(VectorLayer.Open(dataDir + "points.geojson", Drivers.GeoJson), symbol, labeling);
map.Padding = 50;
map.Render(dataDir + "points_labeling_styled_out.svg", Renderers.Svg);
}
//ExEnd: PointsLabelingStyled
}
public static void ChangeMarkerStyleFeatureBased()
{
//ExStart: ChangeMarkerStyleFeatureBased
using (var map = new Map(500, 200))
{
var symbol = new SimpleMarker()
{
FillColor = Color.LightBlue
};
symbol.FeatureBasedConfiguration = (feature, symbolizer) =>
{
// retirieve city population (in thousands) from a feature attribute
var population = feature.GetValue <int>("population");
// let's increase circle radius by 5 pixels for each million people
symbolizer.Size = 5 * population / 1000;
// and let's draw cities with less than 2.5M people in green
if (population < 2500)
{
symbolizer.FillColor = Color.GreenYellow;
}
};
map.Add(VectorLayer.Open(dataDir + "points.geojson", Drivers.GeoJson), symbol);
map.Padding = 20;
map.Render(dataDir + "points_out.svg", Renderers.Svg);
}
//ExEnd: ChangeMarkerStyleFeatureBased
}
public static void DefaultMarkerStyle()
{
//ExStart: DefaultMarkerStyle
using (var map = new Map(500, 200))
{
var symbol = new SimpleMarker();
map.Add(VectorLayer.Open(dataDir + "points.geojson", Drivers.GeoJson), symbol);
map.Padding = 20;
map.Render(dataDir + "points_out.svg", Renderers.Svg);
}
//ExEnd: DefaultMarkerStyle
}
public static void ChangeMarkerStyle()
{
//ExStart: ChangeMarkerStyle
using (var map = new Map(500, 200))
{
var symbol = new SimpleMarker()
{
Size = 7, StrokeWidth = 1, FillColor = Color.Red
};
map.Add(VectorLayer.Open(dataDir + "points.geojson", Drivers.GeoJson), symbol);
map.Padding = 20;
map.Render(dataDir + "points_out.svg", Renderers.Svg);
}
//ExEnd: ChangeMarkerStyle
}
public static void RuleBasedLabeling()
{
//ExStart: RuleBasedLabeling
using (var map = new Map(500, 200))
{
var symbolizer = new SimpleMarker {
FillColor = Color.LightGray, StrokeStyle = StrokeStyle.None
};
var labeling = new RuleBasedLabeling();
// Set labeling to be used for small cities.
labeling.Add(f => f.GetValue <int>("population") <= 2500, new SimpleLabeling("name")
{
FontStyle = FontStyle.Italic,
HaloSize = 1,
FontSize = 10,
FontColor = Color.Green,
Priority = 1,
Placement = new PointLabelPlacement
{
VerticalAnchorPoint = VerticalAnchor.Bottom,
HorizontalAnchorPoint = HorizontalAnchor.Center,
}
});
// Set labeling to be used for all other cities.
labeling.AddElseRule(new SimpleLabeling("name")
{
HaloSize = 1,
FontSize = 15,
FontColor = Color.Red,
Priority = 2,
Placement = new PointLabelPlacement
{
VerticalAnchorPoint = VerticalAnchor.Bottom,
HorizontalAnchorPoint = HorizontalAnchor.Center,
}
});
map.Add(VectorLayer.Open(dataDir + "points.geojson", Drivers.GeoJson), symbolizer, labeling);
map.Padding = 40;
map.Render(dataDir + "rule_based_labeling_out.svg", Renderers.Svg);
}
//ExEnd: RuleBasedLabeling
}
public static void ChangeMarkerStyleTriangles()
{
//ExStart: ChangeMarkerStyleTriangles
using (var map = new Map(500, 200))
{
var symbol = new SimpleMarker()
{
Size = 15,
FillColor = Color.DarkMagenta,
StrokeStyle = StrokeStyle.None,
ShapeType = MarkerShapeType.Triangle,
Rotation = 90
};
map.Add(VectorLayer.Open(dataDir + "points.geojson", Drivers.GeoJson), symbol);
map.Padding = 20;
map.Render(dataDir + "points_out.svg", Renderers.Svg);
}
//ExEnd: ChangeMarkerStyleTriangles
}
private void updateMarker(SimpleMarker marker)
{
marker.FillStyle.FillMode = FillMode.Solid;
marker.Size = UIConstants.Chart.SERIES_MARKER_SIZE + Curve.LineThickness * Curve.LineThickness;
}
