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 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 LinesLabelingCurvedWithOffset()
{
//ExStart: LinesLabelingCurvedWithOffset
using (var map = new Map(1000, 634))
{
var symbolizer = new SimpleLine {
Width = 1.5, Color = Color.FromArgb(0xAE, 0xD9, 0xFD)
};
var labeling = new SimpleLabeling(labelAttribute: "name")
{
HaloSize = 1,
Placement = new LineLabelPlacement
{
Alignment = LineLabelAlignment.Curved,
Offset = 5,
}
};
map.Add(VectorLayer.Open(dataDir + "lines.geojson", Drivers.GeoJson), symbolizer, labeling);
map.Padding = 50;
map.Render(dataDir + "lines_labeling_curved_offset_out.svg", Renderers.Svg);
}
//ExEnd: LinesLabelingCurvedWithOffset
}
public static void LinesLabelingFeatureBased()
{
//ExStart: LinesLabelingFeatureBased
using (var map = new Map(1000, 634))
{
var lineSymbolizer = new SimpleLine {
Width = 1.5, Color = Color.FromArgb(0xae, 0xd9, 0xfd)
};
lineSymbolizer.FeatureBasedConfiguration = (feature, symbolizer) =>
{
if (feature.GetValue <string>("NAM") == "UNK")
{
symbolizer.Width = 1;
symbolizer.Style = StrokeStyle.Dash;
}
};
var lineLabeling = new SimpleLabeling(labelAttribute: "name")
{
HaloSize = 1,
Placement = new LineLabelPlacement
{
Alignment = LineLabelAlignment.Parallel,
},
FontSize = 20,
FeatureBasedConfiguration = (feature, labeling) =>
{
if (feature.GetValue <string>("NAM") == "UNK")
{
// change labeling properties for some features.
labeling.FontStyle = FontStyle.Italic;
labeling.FontSize = 10;
labeling.Priority = -1;
var placement = (LineLabelPlacement)labeling.Placement;
placement.Alignment = LineLabelAlignment.Curved;
placement.Offset = 5;
}
}
};
map.Add(VectorLayer.Open(dataDir + "lines.geojson", Drivers.GeoJson), lineSymbolizer, lineLabeling);
map.Padding = 50;
map.Render(dataDir + "lines_labeling_feature_based_out.svg", Renderers.Svg);
}
//ExEnd: LinesLabelingFeatureBased
}
public static void LinesLabeling()
{
//ExStart: LinesLabeling
using (var map = new Map(1000, 634))
{
var symbolizer = new SimpleLine {
Width = 1.5, Color = Color.FromArgb(0xAE, 0xD9, 0xFD)
};
var labeling = new SimpleLabeling(labelAttribute: "name");
map.Add(VectorLayer.Open(dataDir + "lines.geojson", Drivers.GeoJson), symbolizer, labeling);
map.Padding = 50;
map.Render(dataDir + "lines_labeling_out.svg", Renderers.Svg);
}
//ExEnd: LinesLabeling
}
public static void PointsLabelingFeatureBased()
{
//ExStart: PointsLabelingFeatureBased
using (var map = new Map(500, 200))
{
var pointLabeling = new SimpleLabeling("name")
{
HaloSize = 1,
Placement = new PointLabelPlacement
{
VerticalAnchorPoint = VerticalAnchor.Bottom,
HorizontalAnchorPoint = HorizontalAnchor.Left,
VerticalOffset = 4,
HorizontalOffset = 4,
},
FeatureBasedConfiguration = (feature, labeling) =>
{
// Retrieve population from the feature.
var population = feature.GetValue <int>("population");
// Font size is computed and is based on the population.
labeling.FontSize = Math.Min(20, 5 * population / 1000);
// Priority of the label is also based on the population.
// The greater the priority is, the more likely label will appear on the output image.
labeling.Priority = population;
}
};
map.Add(VectorLayer.Open(dataDir + "points.geojson", Drivers.GeoJson), new SimpleMarker(), pointLabeling);
map.Padding = 50;
map.Render(dataDir + "points_labeling_feature_based_out.svg", Renderers.Svg);
}
//ExEnd: PointsLabelingFeatureBased
}
