Line Configuration

The lines tab appears for layers with LineString geometry (e.g. roads, railways, rivers, pipelines). Three line types are available:

Gradient

Colour lines along a colour ramp based on a numeric data property. Configuration is the same as polygon gradient fill — select a property, choose a palette, set opacity, and optionally customise stops.

A legend is available with the same options as for polygon fills.

Single Colour

Apply a uniform colour to all line features:

• Colour — pick any colour.
• Opacity — line transparency (0–100%).

Rule-Based

Define rules that map attribute values to colours and per-rule widths. Each rule specifies:

• Property, Operator, Value — same as polygon rule-based fill.
• Colour — the colour to apply when the rule matches.
• Width (optional) — an override width for lines matching this rule.

A rule-based legend is also available.

None

Disable line rendering entirely.

Common Line Options

These options are available for all line types except "None":

Width Stops

Line width can vary by zoom level using 2–6 zoom/width stops, with smooth interpolation between them.

Dash Pattern

Specify a repeating dash-gap pattern (e.g. 6, 3 for dashed lines). Leave empty for solid lines.

Line Cap

Controls how the ends of lines are drawn:

• Butt — flat ends.
• Round — rounded ends.
• Square — square ends extending slightly beyond the endpoint.

Line Join

Controls how line segments are joined:

• Bevel — flat join.
• Round — rounded join.
• Miter — sharp pointed join.