WorldWind Kotlin/earth.worldwind.layer.mvt/DefaultMvtStyle

DefaultMvtStyle

Hardcoded style table approximating an OpenMapTiles "basic" look. Covers the layer names commonly seen across OpenMapTiles, Maptiler v3, Mapbox v8, and Protomaps "basemaps" schemas.

Decisions:

POINT features always return null — hand-coded styles don't carry label data; use MvtRuleBasedStyle for labels.
Roads are styled by class/kind property where available, with a generic fallback.
Outlines are off for area fills — outlining a dense mesh of tiny polygons drops the framerate without improving readability.
Shadows are off layer-wide; vector-tile features are flat surface decals, not occluders.

Properties

backgroundColor

open val backgroundColor: Color?

Solid base under every fill — the Mapbox background layer. Fills gaps MVT has no polygon for (bare rock, street interiors, highway corridors); null (default) shows whatever is beneath the layer. See Z_BACKGROUND.

BOUNDARY_LINE

val BOUNDARY_LINE: ShapeAttributes

BUILDING_FILL

val BUILDING_FILL: ShapeAttributes

LANDUSE_FILL

val LANDUSE_FILL: ShapeAttributes

PARK_FILL

val PARK_FILL: ShapeAttributes

PATH_LINE

val PATH_LINE: ShapeAttributes

RAIL_LINE

val RAIL_LINE: ShapeAttributes

ROAD_MAJOR

val ROAD_MAJOR: ShapeAttributes

ROAD_MINOR

val ROAD_MINOR: ShapeAttributes

ROAD_PRIMARY

val ROAD_PRIMARY: ShapeAttributes

ROCK_FILL

val ROCK_FILL: ShapeAttributes

SAND_FILL

val SAND_FILL: ShapeAttributes

SNOW_FILL

val SNOW_FILL: ShapeAttributes

TRACK_LINE

val TRACK_LINE: ShapeAttributes

URBAN_FILL

val URBAN_FILL: ShapeAttributes

VEGETATION_FILL

val VEGETATION_FILL: ShapeAttributes

WATER_FILL

val WATER_FILL: ShapeAttributes

WATERWAY_LINE

val WATERWAY_LINE: ShapeAttributes

WETLAND_FILL

val WETLAND_FILL: ShapeAttributes

Functions

styleFor

open override fun styleFor(layerName: String, geometryType: MvtGeometryType, properties: Map<String, Any?>): ShapeAttributes?

Resolve attributes for one feature. layerName is the MVT layer (e.g. water, transportation, building); geometryType gates polygon-vs-line attribute choice. properties is the inflated feature property map.

zOrderFor

open override fun zOrderFor(layerName: String, geometryType: MvtGeometryType, properties: Map<String, Any?>): Int

Optional paint order within a tile. Features with smaller zOrderFor paint first, features with larger values paint over them. Default 0 — every feature shares the same z-layer, and the order falls through to MVT-server-determined layer iteration order (good enough for OpenMapTiles-schema servers that already order water → landuse → roads → buildings sensibly).