Line Symbolizer

Line Symbolizer

The Simple Line symbolizer draws a line with customizable style. This is the default symbolizer for 1-dimensional geometries (lines). 

Supported styling options:

Property Description
Color Specifies the color and transparency given to the line.
Width Specifies the width of the line
LineJoin Determines how lines are rendered at intersections of line segments.
Style Specifies how the symbol linework should be drawn.
DashPattern Specifies an array of distances that specifies the lengths of alternating dashes and spaces in dashed lines.
DashOffset Specifies the distance from the start of a line to the beginning of a dash pattern.

Specifies how lines are rendered at their ends.

- Butt - sharp square edge

- Round - rounded edge

- Square - slightly elongated square edge

Offset Specifies offset from the original line. For positive distance the offset will be at the left side of the input line (relative to the line direction). For a negative distance it’ll be at the right side.

Geometry Types

 The symbolizer can be applied to geometries of any type.

Geometry Dimension Geometry Types Rendering Behavior
Point Point, MultiPoint Draws a line of a small length with a horizontal orientation centered on the point, with two end caps.
Line LineString, CircularString, CompoundCurve, LinerRing, MultiCurve, MultiLineString Draws the line.
Surface Polygon, CurvePolygon, MultiPolygon, MultiSurface Closed outline of the geometry is used as the line string (with no end caps)

For GeometryCollections, the rendering behavior is determined separately for each geometry inside the collection. Layers with Mixed geometry type follow the logic for GeometryCollections.

Use MixedGeometrySymbolizer to limit a symbolizer to specific geometry types.


By default the line symbolizer draws black lines:

Here’s how to change line color to blue:


For more advanced scenarios, you might want to adjust the line style dynamically based on feature attribute values. Here’s how to do that:


You might also want to add labels to your lines. Visit Lines Labeling Examples for examples.