Styling Layers

The Style panel on the right edits the appearance of the layer selected in the Layers panel. Vector and raster layers each get their own set of controls.

Vector styling

For vector layers the Style panel covers fill, stroke, points, labels, and 3D extrusion:

• Fill: fill color and fill opacity for polygons.
• Stroke: line color and width for lines and polygon outlines.
• Points: circle radius for point layers.
• Labels: text color, size, halo color, and halo width.
• 3D extrusion: turn polygons into extruded blocks, with a height field, height scale, base height, and color. Advanced expressions are available for both height and color.

You can also set a per-style minimum and maximum zoom so a style only applies within a zoom range.

Style type (data-driven styling)

The Style type control chooses how feature values map to color:

Style type	Description
Single symbology	One uniform style for every feature.
Graduated	Classify a numeric field into classes with a color ramp. Choose the field, the number of classes, a classification scheme (such as equal interval or quantile), and a colormap.
Categorized	Assign a color per unique category value of a field.
Expression	Drive styling with a custom MapLibre expression for full control.

For graduated and categorized styles, GeoLibre generates the class breaks or category stops and shows them in the panel, where you can fine-tune individual colors before applying.

Choropleth maps

To make a choropleth, select Graduated, pick a numeric attribute, choose a colormap, and click Apply style type. See the Your First Map tutorial.

Raster styling

For raster layers the Style panel exposes image adjustments:

• Brightness (minimum and maximum)
• Saturation
• Contrast
• Hue rotation (in degrees)

These let you tune the look of GeoTIFF, COG, and tile-based raster layers without changing the underlying data.

Legends and colorbars

To display a legend or a continuous colorbar on the map, open them from the Controls menu. They reflect the styling you set here.