Layers

What is drawn, in the order the map holds them. Created with kind layer.

Type	Class
"celestial"	CelestialLayer
"composite-vector"	CompositeVectorTileLayer
"elements"	VectorLayer
"hillshade"	HillshadeRasterTileLayer
"raster"	RasterTileLayer
"solid"	SolidLayer
"vector"	VectorTileLayer

"celestial" — CelestialLayer

{"type": "celestial"}

Key	Type	Always required	Notes

Property	Type	Access	Description
celestialEventListener	object layers.CelestialEventListener	read/write	Returns the object event listener.

Inherited from Layer:

Property	Type	Access	Description
billboardsUnderLabels	boolean	read/write	Returns whether the billboards of this layer (markers, popups) draw under the labels of the vector tile layers that render them last, rather than over everything. The default is false.
cullDelay	integer	read/write	Returns the culling delay of the layer in milliseconds.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the layer meta data map. The changes you make to this map are NOT reflected in the actual meta data of the layer.
opacity	number	read/write	Returns the opacity of this layer.
postProcessed	boolean	read/write	Returns whether this layer goes through the post-process effect.
updatePriority	integer	read/write	Returns the layer task priority of this layer.
visible	boolean	read/write	Returns the visibility of this layer.
visibleZoomRange	struct massif::MapRange	read/write	Returns the visible zoom range of this layer.

Method	Arguments	Returns
add	object: handle	void
clear	—	void
refresh	—	void
remove	object: handle	bool

Event	Payload	Consumable
celestial.clicked	CelestialClickInfo	yes
sky.clicked	CelestialClickInfo	yes

"composite-vector" — CompositeVectorTileLayer

{"type": "composite-vector", "source": …, "style": …}

Key	Type	Always required	Notes
source	object std::shared_ptr<TileDataSource>	yes	an id of kind source, or an inline spec
style	object std::shared_ptr<VectorTileDecoder>	yes	an id of kind style, or an inline spec

Inherited from VectorTileLayer:

Property	Type	Access	Description
buildingRenderOrder	enum	read/write	Returns the current display order of the buildings. LAST draws over flat labels too: a label that must clear a building is a billboard one, whose pass runs after the buildings.
clickHandlerLayerFilter	string	read/write	Returns the click handler layer filter. The filter is given as ECMA regular expression that is applied to qualified layer names.
clickRadius	number	read/write	Returns the click radius of vector tile features. Units are screen density independent pixels (DP or DIP).
labelBlendingSpeed	number	read/write	Returns the current relative label blending speed.
labelPerspectiveScaling	number	read/write	Returns how much of the perspective divide a label keeps as it recedes from the camera.
labelRenderOrder	enum	read/write	Returns the current display order of the labels.
layerBlendingSpeed	number	read/write	Returns the current relative layer blending speed.
rendererLayerFilter	string	read/write	Returns the renderer layer filter. The filter is given as ECMA regular expression that is applied to qualified layer names.
tileCacheCapacity	integer	read/write	Returns the tile cache capacity.
tileDecoder or style	object vectortiles.VectorTileDecoder	read-only	Returns the tile decoder assigned to this layer.
vectorTileEventListener	object layers.VectorTileEventListener	read/write	Returns the vector tile event listener.

Inherited from TileLayer:

Property	Type	Access	Description
UTFGridDataSource	object datasources.TileDataSource	read/write	Returns the tile data source of the associated UTF grid. By default this is null.
UTFGridEventListener	object layers.UTFGridEventListener	read/write	Returns the UTF grid event listener.
dataSource or source	object datasources.TileDataSource	read-only	Returns the data source assigned to this layer.
frameNr	integer	read/write	Returns the current frame number.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this layer.
maxUnderzoomLevel	integer	read/write	Gets the current maximum underzoom level for this layer.
preloading	boolean	read/write	Returns the state of the preloading flag of this layer.
preloadingTileCount	integer	read-only
projection	object projections.Projection	read-only	Returns the projection this layer's data is in, which is its data source's.
synchronizedRefresh	boolean	read/write	Returns the state of the synchronized refresh flag.
tileLoadListener	object layers.TileLoadListener	read/write	Returns the tile load listener.
tileSubstitutionPolicy	enum	read/write	Returns the current tile substitution policy.
visibleTileCount	integer	read-only	How many tiles the last cull put on screen. A diagnostic: it is what the tile LOD numbers actually cost.
zoomLevelBias	number	read/write	Gets the current zoom level bias for this layer.

Inherited from Layer:

Property	Type	Access	Description
billboardsUnderLabels	boolean	read/write	Returns whether the billboards of this layer (markers, popups) draw under the labels of the vector tile layers that render them last, rather than over everything. The default is false.
cullDelay	integer	read/write	Returns the culling delay of the layer in milliseconds.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the layer meta data map. The changes you make to this map are NOT reflected in the actual meta data of the layer.
opacity	number	read/write	Returns the opacity of this layer.
postProcessed	boolean	read/write	Returns whether this layer goes through the post-process effect.
updatePriority	integer	read/write	Returns the layer task priority of this layer.
visible	boolean	read/write	Returns the visibility of this layer.
visibleZoomRange	struct massif::MapRange	read/write	Returns the visible zoom range of this layer.

Method	Arguments	Returns
addExternalDataSource	name: string, dataSource: handle, type: int	void
addVectorDataSource	name: string, dataSource: handle	void
clearTileCaches	all: bool	void
getExternalChildLayer	name: string	object
getExternalDataSourceNames	—	json
refresh	—	void
removeExternalDataSource	name: string	bool
setExternalDataSourceMaxOverzoomLevel	name: string, level: int	void
setExternalDataSourceZoomLevelBias	name: string, bias: float	void

Event	Payload	Consumable
vectortile.clicked	VectorTileClickInfo	yes

"elements" — VectorLayer

{"type": "elements", "source": …}

Key	Type	Always required	Notes
source	object std::shared_ptr<VectorDataSource>	yes	an id of kind source, or an inline spec

Property	Type	Access	Description
ZBuffering	boolean	read/write	Returns true if Z-buffering is enabled for 2D geometry. By default it is disabled and used only for billboards.
dataSource	object datasources.VectorDataSource	read-only	Returns the vector data source of this vector layer.
vectorElementEventListener	object layers.VectorElementEventListener	read/write	Returns the vector element event listener.

Inherited from Layer:

Property	Type	Access	Description
billboardsUnderLabels	boolean	read/write	Returns whether the billboards of this layer (markers, popups) draw under the labels of the vector tile layers that render them last, rather than over everything. The default is false.
cullDelay	integer	read/write	Returns the culling delay of the layer in milliseconds.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the layer meta data map. The changes you make to this map are NOT reflected in the actual meta data of the layer.
opacity	number	read/write	Returns the opacity of this layer.
postProcessed	boolean	read/write	Returns whether this layer goes through the post-process effect.
updatePriority	integer	read/write	Returns the layer task priority of this layer.
visible	boolean	read/write	Returns the visibility of this layer.
visibleZoomRange	struct massif::MapRange	read/write	Returns the visible zoom range of this layer.

Method	Arguments	Returns
refresh	—	void

Event	Payload	Consumable
vectorelement.clicked	VectorElementClickInfo	yes

"hillshade" — HillshadeRasterTileLayer

{"type": "hillshade", "source": …}

Key	Type	Always required	Notes
source	object std::shared_ptr<TileDataSource>	yes	an id of kind source, or an inline spec

Property	Type	Access	Description
accentColor	color	read/write	Returns the shading color used to accentuate rugged terrain like sharp cliffs and gorges.
contourColor	color	read/write	Returns the contour line color.
contourEnabled	boolean	read/write	Returns whether GPU contour lines are drawn over the hillshade.
contourInterval	number	read/write	Returns the spacing between contour lines in meters.
contourWidth	number	read/write	Returns the contour line half-width in screen pixels.
contrast	number	read/write	Returns the contrast of the hillshade overlay. This is the equivalent of MapLibre's 'hillshade-exaggeration' paint property: it controls the slope response curve and the overall strength of the shading, not the relief itself.
elevationEncodingEnabled	boolean	read/write	Returns whether the normal map encodes absolute elevation (so a custom normal-map lighting shader can call getElevation()).
exagerateHeightScaleEnabled	boolean	read/write	Returns the normal vector tile should be exagerated based on the zoom level.
exaggeration	number	read/write	Returns the per-frame relief exaggeration factor, i.e. the vertical exaggeration of the slope. Unlike height scale this is a shader uniform applied at render time (no tile re-decode), so it can be animated smoothly.
heightScale	number	read/write	Returns the height scale of the hillshade overlay.
highlightColor	color	read/write	Returns the shading color of areas that faces towards the light source.
hillshadeMethod	enum	read/write	Returns the hillshade rendering method.
illuminationDirection	struct massif::MapVec	read/write	Returns the illumination direction of the layer.
illuminationMapRotationEnabled	boolean	read/write	Returns whether the illumination direction should change with the map rotation.
legacyHeightScaleEnabled	boolean	read/write	Returns whether the legacy (pre-MapLibre-parity) height scale formula is used.
normalMapLightingShader	string	read/write
shadowColor	color	read/write	Returns the shading color of areas that face away from the light source.
terrainPaintEnabled	boolean	read/write	Returns whether the layer may shade the 3D terrain's own elevation texture instead of loading a DEM tile set of its own.
terrainPaintFullDetailEnabled	boolean	read/write	Returns whether the terrain paint shades from the elevation source's own maximum zoom.

Inherited from CustomRasterTileLayer:

Property	Type	Access	Description
shaderSource	string	read/write	Returns the custom fragment shader source.

Inherited from RasterTileLayer:

Property	Type	Access	Description
rasterTileEventListener	object layers.RasterTileEventListener	read/write	Returns the raster tile event listener.
textureCacheCapacity	integer	read/write	Returns the tile texture cache capacity.
tileBlendingSpeed	number	read/write	Returns the current relative tile blending speed.
tileFilterMode	enum	read/write	Returns the current tile filter mode.

Inherited from TileLayer:

Property	Type	Access	Description
UTFGridDataSource	object datasources.TileDataSource	read/write	Returns the tile data source of the associated UTF grid. By default this is null.
UTFGridEventListener	object layers.UTFGridEventListener	read/write	Returns the UTF grid event listener.
dataSource or source	object datasources.TileDataSource	read-only	Returns the data source assigned to this layer.
frameNr	integer	read/write	Returns the current frame number.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this layer.
maxUnderzoomLevel	integer	read/write	Gets the current maximum underzoom level for this layer.
preloading	boolean	read/write	Returns the state of the preloading flag of this layer.
preloadingTileCount	integer	read-only
projection	object projections.Projection	read-only	Returns the projection this layer's data is in, which is its data source's.
synchronizedRefresh	boolean	read/write	Returns the state of the synchronized refresh flag.
tileLoadListener	object layers.TileLoadListener	read/write	Returns the tile load listener.
tileSubstitutionPolicy	enum	read/write	Returns the current tile substitution policy.
visibleTileCount	integer	read-only	How many tiles the last cull put on screen. A diagnostic: it is what the tile LOD numbers actually cost.
zoomLevelBias	number	read/write	Gets the current zoom level bias for this layer.

Inherited from Layer:

Property	Type	Access	Description
billboardsUnderLabels	boolean	read/write	Returns whether the billboards of this layer (markers, popups) draw under the labels of the vector tile layers that render them last, rather than over everything. The default is false.
cullDelay	integer	read/write	Returns the culling delay of the layer in milliseconds.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the layer meta data map. The changes you make to this map are NOT reflected in the actual meta data of the layer.
opacity	number	read/write	Returns the opacity of this layer.
postProcessed	boolean	read/write	Returns whether this layer goes through the post-process effect.
updatePriority	integer	read/write	Returns the layer task priority of this layer.
visible	boolean	read/write	Returns the visibility of this layer.
visibleZoomRange	struct massif::MapRange	read/write	Returns the visible zoom range of this layer.

Method	Arguments	Returns
clearTileCaches	all: bool	void
getElevation	pos: pos	float
getElevations	positions: positions	doubles
refresh	—	void

"raster" — RasterTileLayer

{"type": "raster", "source": …}

Key	Type	Always required	Notes
source	object std::shared_ptr<TileDataSource>	yes	an id of kind source, or an inline spec

Property	Type	Access	Description
rasterTileEventListener	object layers.RasterTileEventListener	read/write	Returns the raster tile event listener.
textureCacheCapacity	integer	read/write	Returns the tile texture cache capacity.
tileBlendingSpeed	number	read/write	Returns the current relative tile blending speed.
tileFilterMode	enum	read/write	Returns the current tile filter mode.

Inherited from TileLayer:

Property	Type	Access	Description
UTFGridDataSource	object datasources.TileDataSource	read/write	Returns the tile data source of the associated UTF grid. By default this is null.
UTFGridEventListener	object layers.UTFGridEventListener	read/write	Returns the UTF grid event listener.
dataSource or source	object datasources.TileDataSource	read-only	Returns the data source assigned to this layer.
frameNr	integer	read/write	Returns the current frame number.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this layer.
maxUnderzoomLevel	integer	read/write	Gets the current maximum underzoom level for this layer.
preloading	boolean	read/write	Returns the state of the preloading flag of this layer.
preloadingTileCount	integer	read-only
projection	object projections.Projection	read-only	Returns the projection this layer's data is in, which is its data source's.
synchronizedRefresh	boolean	read/write	Returns the state of the synchronized refresh flag.
tileLoadListener	object layers.TileLoadListener	read/write	Returns the tile load listener.
tileSubstitutionPolicy	enum	read/write	Returns the current tile substitution policy.
visibleTileCount	integer	read-only	How many tiles the last cull put on screen. A diagnostic: it is what the tile LOD numbers actually cost.
zoomLevelBias	number	read/write	Gets the current zoom level bias for this layer.

Inherited from Layer:

Property	Type	Access	Description
billboardsUnderLabels	boolean	read/write	Returns whether the billboards of this layer (markers, popups) draw under the labels of the vector tile layers that render them last, rather than over everything. The default is false.
cullDelay	integer	read/write	Returns the culling delay of the layer in milliseconds.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the layer meta data map. The changes you make to this map are NOT reflected in the actual meta data of the layer.
opacity	number	read/write	Returns the opacity of this layer.
postProcessed	boolean	read/write	Returns whether this layer goes through the post-process effect.
updatePriority	integer	read/write	Returns the layer task priority of this layer.
visible	boolean	read/write	Returns the visibility of this layer.
visibleZoomRange	struct massif::MapRange	read/write	Returns the visible zoom range of this layer.

Method	Arguments	Returns
clearTileCaches	all: bool	void
refresh	—	void

"solid" — SolidLayer

{"type": "solid", "color": …}
{"type": "solid", "bitmap": …}

Key	Type	Always required	Notes
color	struct Color	no
bitmap	object std::shared_ptr<Bitmap>	no	an id of kind bitmap, or an inline spec

Property	Type	Access	Description
bitmap	object std::shared_ptr<massif::Bitmap>	read/write	Returns the bitmap of this layer.
bitmapScale	number	read/write	Returns the bitmap scaling factor.
color	color	read/write	Returns the color of this layer.

Inherited from Layer:

Property	Type	Access	Description
billboardsUnderLabels	boolean	read/write	Returns whether the billboards of this layer (markers, popups) draw under the labels of the vector tile layers that render them last, rather than over everything. The default is false.
cullDelay	integer	read/write	Returns the culling delay of the layer in milliseconds.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the layer meta data map. The changes you make to this map are NOT reflected in the actual meta data of the layer.
opacity	number	read/write	Returns the opacity of this layer.
postProcessed	boolean	read/write	Returns whether this layer goes through the post-process effect.
updatePriority	integer	read/write	Returns the layer task priority of this layer.
visible	boolean	read/write	Returns the visibility of this layer.
visibleZoomRange	struct massif::MapRange	read/write	Returns the visible zoom range of this layer.

Method	Arguments	Returns
refresh	—	void

"vector" — VectorTileLayer

{"type": "vector", "source": …, "style": …}

Key	Type	Always required	Notes
source	object std::shared_ptr<TileDataSource>	yes	an id of kind source, or an inline spec
style	object std::shared_ptr<VectorTileDecoder>	yes	an id of kind style, or an inline spec

Property	Type	Access	Description
buildingRenderOrder	enum	read/write	Returns the current display order of the buildings. LAST draws over flat labels too: a label that must clear a building is a billboard one, whose pass runs after the buildings.
clickHandlerLayerFilter	string	read/write	Returns the click handler layer filter. The filter is given as ECMA regular expression that is applied to qualified layer names.
clickRadius	number	read/write	Returns the click radius of vector tile features. Units are screen density independent pixels (DP or DIP).
labelBlendingSpeed	number	read/write	Returns the current relative label blending speed.
labelPerspectiveScaling	number	read/write	Returns how much of the perspective divide a label keeps as it recedes from the camera.
labelRenderOrder	enum	read/write	Returns the current display order of the labels.
layerBlendingSpeed	number	read/write	Returns the current relative layer blending speed.
rendererLayerFilter	string	read/write	Returns the renderer layer filter. The filter is given as ECMA regular expression that is applied to qualified layer names.
tileCacheCapacity	integer	read/write	Returns the tile cache capacity.
tileDecoder or style	object vectortiles.VectorTileDecoder	read-only	Returns the tile decoder assigned to this layer.
vectorTileEventListener	object layers.VectorTileEventListener	read/write	Returns the vector tile event listener.

Inherited from TileLayer:

Property	Type	Access	Description
UTFGridDataSource	object datasources.TileDataSource	read/write	Returns the tile data source of the associated UTF grid. By default this is null.
UTFGridEventListener	object layers.UTFGridEventListener	read/write	Returns the UTF grid event listener.
dataSource or source	object datasources.TileDataSource	read-only	Returns the data source assigned to this layer.
frameNr	integer	read/write	Returns the current frame number.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this layer.
maxUnderzoomLevel	integer	read/write	Gets the current maximum underzoom level for this layer.
preloading	boolean	read/write	Returns the state of the preloading flag of this layer.
preloadingTileCount	integer	read-only
projection	object projections.Projection	read-only	Returns the projection this layer's data is in, which is its data source's.
synchronizedRefresh	boolean	read/write	Returns the state of the synchronized refresh flag.
tileLoadListener	object layers.TileLoadListener	read/write	Returns the tile load listener.
tileSubstitutionPolicy	enum	read/write	Returns the current tile substitution policy.
visibleTileCount	integer	read-only	How many tiles the last cull put on screen. A diagnostic: it is what the tile LOD numbers actually cost.
zoomLevelBias	number	read/write	Gets the current zoom level bias for this layer.

Inherited from Layer:

Property	Type	Access	Description
billboardsUnderLabels	boolean	read/write	Returns whether the billboards of this layer (markers, popups) draw under the labels of the vector tile layers that render them last, rather than over everything. The default is false.
cullDelay	integer	read/write	Returns the culling delay of the layer in milliseconds.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the layer meta data map. The changes you make to this map are NOT reflected in the actual meta data of the layer.
opacity	number	read/write	Returns the opacity of this layer.
postProcessed	boolean	read/write	Returns whether this layer goes through the post-process effect.
updatePriority	integer	read/write	Returns the layer task priority of this layer.
visible	boolean	read/write	Returns the visibility of this layer.
visibleZoomRange	struct massif::MapRange	read/write	Returns the visible zoom range of this layer.

Method	Arguments	Returns
clearTileCaches	all: bool	void
refresh	—	void

Event	Payload	Consumable
vectortile.clicked	VectorTileClickInfo	yes

Base classes

Not constructed directly. Their properties are reachable on every object above that derives from them.

CustomRasterTileLayer

Property	Type	Access	Description
shaderSource	string	read/write	Returns the custom fragment shader source.

Inherited from RasterTileLayer:

Property	Type	Access	Description
rasterTileEventListener	object layers.RasterTileEventListener	read/write	Returns the raster tile event listener.
textureCacheCapacity	integer	read/write	Returns the tile texture cache capacity.
tileBlendingSpeed	number	read/write	Returns the current relative tile blending speed.
tileFilterMode	enum	read/write	Returns the current tile filter mode.

Inherited from TileLayer:

Property	Type	Access	Description
UTFGridDataSource	object datasources.TileDataSource	read/write	Returns the tile data source of the associated UTF grid. By default this is null.
UTFGridEventListener	object layers.UTFGridEventListener	read/write	Returns the UTF grid event listener.
dataSource or source	object datasources.TileDataSource	read-only	Returns the data source assigned to this layer.
frameNr	integer	read/write	Returns the current frame number.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this layer.
maxUnderzoomLevel	integer	read/write	Gets the current maximum underzoom level for this layer.
preloading	boolean	read/write	Returns the state of the preloading flag of this layer.
preloadingTileCount	integer	read-only
projection	object projections.Projection	read-only	Returns the projection this layer's data is in, which is its data source's.
synchronizedRefresh	boolean	read/write	Returns the state of the synchronized refresh flag.
tileLoadListener	object layers.TileLoadListener	read/write	Returns the tile load listener.
tileSubstitutionPolicy	enum	read/write	Returns the current tile substitution policy.
visibleTileCount	integer	read-only	How many tiles the last cull put on screen. A diagnostic: it is what the tile LOD numbers actually cost.
zoomLevelBias	number	read/write	Gets the current zoom level bias for this layer.

Inherited from Layer:

Property	Type	Access	Description
billboardsUnderLabels	boolean	read/write	Returns whether the billboards of this layer (markers, popups) draw under the labels of the vector tile layers that render them last, rather than over everything. The default is false.
cullDelay	integer	read/write	Returns the culling delay of the layer in milliseconds.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the layer meta data map. The changes you make to this map are NOT reflected in the actual meta data of the layer.
opacity	number	read/write	Returns the opacity of this layer.
postProcessed	boolean	read/write	Returns whether this layer goes through the post-process effect.
updatePriority	integer	read/write	Returns the layer task priority of this layer.
visible	boolean	read/write	Returns the visibility of this layer.
visibleZoomRange	struct massif::MapRange	read/write	Returns the visible zoom range of this layer.

Method	Arguments	Returns
clearTileCaches	all: bool	void
refresh	—	void

Layer

Property	Type	Access	Description
billboardsUnderLabels	boolean	read/write	Returns whether the billboards of this layer (markers, popups) draw under the labels of the vector tile layers that render them last, rather than over everything. The default is false.
cullDelay	integer	read/write	Returns the culling delay of the layer in milliseconds.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the layer meta data map. The changes you make to this map are NOT reflected in the actual meta data of the layer.
opacity	number	read/write	Returns the opacity of this layer.
postProcessed	boolean	read/write	Returns whether this layer goes through the post-process effect.
updatePriority	integer	read/write	Returns the layer task priority of this layer.
visible	boolean	read/write	Returns the visibility of this layer.
visibleZoomRange	struct massif::MapRange	read/write	Returns the visible zoom range of this layer.

Method	Arguments	Returns
refresh	—	void

TileLayer

Property	Type	Access	Description
UTFGridDataSource	object datasources.TileDataSource	read/write	Returns the tile data source of the associated UTF grid. By default this is null.
UTFGridEventListener	object layers.UTFGridEventListener	read/write	Returns the UTF grid event listener.
dataSource or source	object datasources.TileDataSource	read-only	Returns the data source assigned to this layer.
frameNr	integer	read/write	Returns the current frame number.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this layer.
maxUnderzoomLevel	integer	read/write	Gets the current maximum underzoom level for this layer.
preloading	boolean	read/write	Returns the state of the preloading flag of this layer.
preloadingTileCount	integer	read-only
projection	object projections.Projection	read-only	Returns the projection this layer's data is in, which is its data source's.
synchronizedRefresh	boolean	read/write	Returns the state of the synchronized refresh flag.
tileLoadListener	object layers.TileLoadListener	read/write	Returns the tile load listener.
tileSubstitutionPolicy	enum	read/write	Returns the current tile substitution policy.
visibleTileCount	integer	read-only	How many tiles the last cull put on screen. A diagnostic: it is what the tile LOD numbers actually cost.
zoomLevelBias	number	read/write	Gets the current zoom level bias for this layer.

Inherited from Layer:

Property	Type	Access	Description
billboardsUnderLabels	boolean	read/write	Returns whether the billboards of this layer (markers, popups) draw under the labels of the vector tile layers that render them last, rather than over everything. The default is false.
cullDelay	integer	read/write	Returns the culling delay of the layer in milliseconds.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the layer meta data map. The changes you make to this map are NOT reflected in the actual meta data of the layer.
opacity	number	read/write	Returns the opacity of this layer.
postProcessed	boolean	read/write	Returns whether this layer goes through the post-process effect.
updatePriority	integer	read/write	Returns the layer task priority of this layer.
visible	boolean	read/write	Returns the visibility of this layer.
visibleZoomRange	struct massif::MapRange	read/write	Returns the visible zoom range of this layer.

Method	Arguments	Returns
clearTileCaches	all: bool	void
refresh	—	void