WorldWind Kotlin/earth.worldwind.layer.mercator/MercatorTiledVectorLayer

MercatorTiledVectorLayer

abstract class MercatorTiledVectorLayer<C : Any>(levelOffset: Int = 0, numLevels: Int = 22, maxLoadedTiles: Int = 256, maxConcurrentFetches: Int = 4, displayName: String? = null) : TiledVectorLayer<C>

TiledVectorLayer over a Web-Mercator slippy tile pyramid (the z/x/y scheme used by MVT vector tiles and OSM building tiles), as opposed to the geographic Plate-Carrée pyramid of earth.worldwind.layer.TiledFeatureLayer.

It feeds the base a LevelSet + MercatorTileFactory built exactly like MercatorTiledImageLayer, so each quadtree tile has level.levelNumber == slippy z, column == x, row == y (the factory inverts Y), and a MercatorSector extent — subdivide and mustSubdivide come from the engine's Mercator tiles for free. The factory's MercatorTileFactory.getImageSource returns null: these tiles are pure quadtree nodes (the layer draws vector content via renderTileContent, never imagery).

Inheritors

MvtVectorLayer

Constructors

MercatorTiledVectorLayer

constructor(levelOffset: Int = 0, numLevels: Int = 22, maxLoadedTiles: Int = 256, maxConcurrentFetches: Int = 4, displayName: String? = null)

Types

Companion

object Companion

Properties

backoffTileCount

val backoffTileCount: Int

Tile keys currently in fetch-failure backoff.

detailControl

var detailControl: Double

Screen-space-error knob: lower = finer (more, smaller on-screen tiles); higher = coarser.

displayName

open override var displayName: String?

isDynamic

open override var isDynamic: Boolean

isEnabled

open override var isEnabled: Boolean

isPickEnabled

open override var isPickEnabled: Boolean

loadedTileCount

val loadedTileCount: Int

Tiles currently resident in the content cache (visible + fallback).

maxActiveAltitude

open override var maxActiveAltitude: Double

maxPendingFetches

val maxPendingFetches: Int = 128

Cap on launched-but-unfinished fetch Jobs (vs semaphore, which gates concurrent round-trips); bounds the queue so a huge changing cut can't pile up unbounded coroutines + HTTP/SSL → OOM. Over-cap tiles re-request a later frame.

minActiveAltitude

open override var minActiveAltitude: Double

opacity

open override var opacity: Float

pendingTileCount

val pendingTileCount: Int

Tiles with a fetch coroutine in flight.

sector

override val sector: Sector

Vector content bounding sector — real data availability can be smaller than the tile grid. Full sphere by default; tiled layers skip tiles outside it. Cache reopen narrows it from the persisted content bbox; bulk download widens and persists it. Mirrors earth.worldwind.globe.elevation.coverage.ElevationCoverage.sector.