Sources

Where a layer's tiles come from — network, file, cache or another source. Created with kind source.

Type	Class
"assets"	AssetTileDataSource
"combined"	CombinedTileDataSource
"contour"	ContourTileDataSource
"geojson"	GeoJSONVectorTileDataSource
"http"	HTTPTileDataSource
"local"	LocalVectorDataSource
"maptiler"	MapTilerOnlineTileDataSource
"mbtiles"	MBTilesTileDataSource
"memory-cache"	MemoryCacheTileDataSource
"merged-mbvt"	MergedMBVTTileDataSource
"multi"	MultiTileDataSource
"ordered"	OrderedTileDataSource
"persistent-cache"	PersistentCacheTileDataSource
"pmtiles"	PMTilesTileDataSource
"point-detail"	PointDetailTileDataSource

"assets" — AssetTileDataSource

{"type": "assets", "minZoom": …, "maxZoom": …, "path": …}

Key	Type	Always required	Notes
minZoom	integer	yes	defaults to 0
maxZoom	integer	yes	defaults to 24
path	string	yes

Inherited from TileDataSource:

Property	Type	Access	Description
dataExtent	struct massif::MapBounds	read-only	Returns the extent of the tiles in this data source. The bounds are in coordinate system of the projection of the data source.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this datasource. Over it the datasource will not be "drawn"
maxZoom	integer	read-only	Returns the maximum zoom level supported by this data source.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the data source meta data map; changes to it are not reflected in the source. The map is attached to every loaded tile, e.g. "dem_encoding" ("mapbox" or "terrarium") selects the elevation decoder. A wrapper source with no map of its own answers with its wrapped source's.
minZoom	integer	read-only	Returns the minimum zoom level supported by this data source.
projection	object projections.Projection	read-only	Returns the projection of this tile source.

Method	Arguments	Returns
getMetaDataElement	key: string	json
loadTile	tile: tile	object
setMetaDataElement	key: string, value: json	void

"combined" — CombinedTileDataSource

{"type": "combined", "source": …, "source2": …, "zoomLevel": …}

Key	Type	Always required	Notes
source	object std::shared_ptr<TileDataSource>	yes	an id of kind source, or an inline spec
source2	object std::shared_ptr<TileDataSource>	yes	an id of kind source, or an inline spec
zoomLevel	integer	yes	defaults to 0

Inherited from TileDataSource:

Property	Type	Access	Description
dataExtent	struct massif::MapBounds	read-only	Returns the extent of the tiles in this data source. The bounds are in coordinate system of the projection of the data source.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this datasource. Over it the datasource will not be "drawn"
maxZoom	integer	read-only	Returns the maximum zoom level supported by this data source.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the data source meta data map; changes to it are not reflected in the source. The map is attached to every loaded tile, e.g. "dem_encoding" ("mapbox" or "terrarium") selects the elevation decoder. A wrapper source with no map of its own answers with its wrapped source's.
minZoom	integer	read-only	Returns the minimum zoom level supported by this data source.
projection	object projections.Projection	read-only	Returns the projection of this tile source.

Method	Arguments	Returns
getMetaDataElement	key: string	json
loadTile	tile: tile	object
setMetaDataElement	key: string, value: json	void

"contour" — ContourTileDataSource

{"type": "contour", "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
baseInterval	number	read/write	Returns the base contour interval in meters.
labelInterval	number	read/write	Returns the contour interval used for label stubs.
labelStubsEnabled	boolean	read/write	Returns whether only short label stubs are generated instead of full contour lines.
layerName	string	read/write	Returns the name of the generated vector tile layer.
minVisibleZoom	integer	read/write	Returns the minimum zoom at which contour geometry is generated.
resolution	integer	read/write	Returns the target grid resolution used for contour tracing.
seamlessEdgesEnabled	boolean	read/write	Returns whether seamless tile edges are enabled.
simplifyTolerance	number	read/write	Returns the simplification tolerance in tile pixels.
terrainOptions	object std::shared_ptr<massif::TerrainOptions>	read/write	Returns the terrain options whose elevation manager the label stubs read.

Inherited from TileDataSource:

Property	Type	Access	Description
dataExtent	struct massif::MapBounds	read-only	Returns the extent of the tiles in this data source. The bounds are in coordinate system of the projection of the data source.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this datasource. Over it the datasource will not be "drawn"
maxZoom	integer	read-only	Returns the maximum zoom level supported by this data source.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the data source meta data map; changes to it are not reflected in the source. The map is attached to every loaded tile, e.g. "dem_encoding" ("mapbox" or "terrarium") selects the elevation decoder. A wrapper source with no map of its own answers with its wrapped source's.
minZoom	integer	read-only	Returns the minimum zoom level supported by this data source.
projection	object projections.Projection	read-only	Returns the projection of this tile source.

Method	Arguments	Returns
getMetaDataElement	key: string	json
loadTile	tile: tile	object
setMetaDataElement	key: string, value: json	void

"geojson" — GeoJSONVectorTileDataSource

{"type": "geojson", "minZoom": …, "maxZoom": …}

Key	Type	Always required	Notes
minZoom	integer	yes	defaults to 0
maxZoom	integer	yes	defaults to 14

Property	Type	Access	Description
defaultLayerBuffer	number	read/write	Returns the default layer buffer in tile pixels.
simplifyTolerance	number	read/write	Returns the simplification tolerance in tile pixels.

Inherited from TileDataSource:

Property	Type	Access	Description
dataExtent	struct massif::MapBounds	read-only	Returns the extent of the tiles in this data source. The bounds are in coordinate system of the projection of the data source.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this datasource. Over it the datasource will not be "drawn"
maxZoom	integer	read-only	Returns the maximum zoom level supported by this data source.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the data source meta data map; changes to it are not reflected in the source. The map is attached to every loaded tile, e.g. "dem_encoding" ("mapbox" or "terrarium") selects the elevation decoder. A wrapper source with no map of its own answers with its wrapped source's.
minZoom	integer	read-only	Returns the minimum zoom level supported by this data source.
projection	object projections.Projection	read-only	Returns the projection of this tile source.

Method	Arguments	Returns
addFeature	layer: int, feature: json	void
createLayer	name: string	int
deleteLayer	layer: int	void
getMetaDataElement	key: string	json
loadTile	tile: tile	object
removeFeature	layer: int, id: json	void
setLayerGeoJSON	layer: int, geoJson: json	void
setMetaDataElement	key: string, value: json	void
updateFeature	layer: int, feature: json	void

"http" — HTTPTileDataSource

{"type": "http", "minZoom": …, "maxZoom": …, "url": …}

Key	Type	Always required	Notes
minZoom	integer	yes	defaults to 0
maxZoom	integer	yes	defaults to 24
url	string	yes

Property	Type	Access	Description
HTTPHeaders	struct std::map<std::string, std::string>	read/write	Returns the current set of HTTP headers used. Initially this set is empty and can be changed with setHTTPHeaders.
TMSScheme	boolean	read/write	Returns true/false based whether the TMS tiling scheme is used.
baseURL	string	read/write	Returns the base URL template containing tags.
maxAgeHeaderCheck	boolean	read/write	Returns true/false based on whether the max-age header check is used. If this is enabled, SDK will automatically refresh the tiles when tiles have expired.
subdomains	struct std::vector<std::string>	read/write	Returns the subdomains for {s} tag. The default is ["a", "b", "c", "d"].
timeout	integer	read/write	Returns the current timeout value.

Inherited from TileDataSource:

Property	Type	Access	Description
dataExtent	struct massif::MapBounds	read-only	Returns the extent of the tiles in this data source. The bounds are in coordinate system of the projection of the data source.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this datasource. Over it the datasource will not be "drawn"
maxZoom	integer	read-only	Returns the maximum zoom level supported by this data source.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the data source meta data map; changes to it are not reflected in the source. The map is attached to every loaded tile, e.g. "dem_encoding" ("mapbox" or "terrarium") selects the elevation decoder. A wrapper source with no map of its own answers with its wrapped source's.
minZoom	integer	read-only	Returns the minimum zoom level supported by this data source.
projection	object projections.Projection	read-only	Returns the projection of this tile source.

Method	Arguments	Returns
getMetaDataElement	key: string	json
loadTile	tile: tile	object
setMetaDataElement	key: string, value: json	void

"local" — LocalVectorDataSource

{"type": "local", "projection": …, "spatialIndexType": …}
{"type": "local", "projection": …}

Key	Type	Always required	Notes
projection	object std::shared_ptr<Projection>	yes	an id of kind projection, or an inline spec
spatialIndexType	enum	no

Property	Type	Access	Description
geometrySimplifier	object geometry.GeometrySimplifier	read/write	Returns the active geometry simplifier of the data source.

Inherited from VectorDataSource:

Property	Type	Access	Description
dataExtent	struct massif::MapBounds	read-only	Returns the extent of the data of this data source. The bounds are in coordinate system of the projection of the data source.
projection	object projections.Projection	read-only	Returns the projection used by this data source.

Method	Arguments	Returns
add	element: handle	void
clear	—	void
remove	element: handle	bool

"maptiler" — MapTilerOnlineTileDataSource

{"type": "maptiler", "key": …}

Key	Type	Always required	Notes
key	string	yes

Property	Type	Access	Description
customServiceURL	string	read/write	Returns the custom backend service URL.
timeout	integer	read/write	Returns the current timeout value.

Inherited from TileDataSource:

Property	Type	Access	Description
dataExtent	struct massif::MapBounds	read-only	Returns the extent of the tiles in this data source. The bounds are in coordinate system of the projection of the data source.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this datasource. Over it the datasource will not be "drawn"
maxZoom	integer	read-only	Returns the maximum zoom level supported by this data source.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the data source meta data map; changes to it are not reflected in the source. The map is attached to every loaded tile, e.g. "dem_encoding" ("mapbox" or "terrarium") selects the elevation decoder. A wrapper source with no map of its own answers with its wrapped source's.
minZoom	integer	read-only	Returns the minimum zoom level supported by this data source.
projection	object projections.Projection	read-only	Returns the projection of this tile source.

Method	Arguments	Returns
getMetaDataElement	key: string	json
loadTile	tile: tile	object
setMetaDataElement	key: string, value: json	void

"mbtiles" — MBTilesTileDataSource

{"type": "mbtiles", "minZoom": …, "maxZoom": …, "path": …, "scheme": …}
{"type": "mbtiles", "minZoom": …, "maxZoom": …, "path": …}
{"type": "mbtiles", "path": …}

Key	Type	Always required	Notes
minZoom	integer	no	defaults to 0
maxZoom	integer	no	defaults to 24
path	string	yes
scheme	enum	no

Inherited from TileDataSource:

Property	Type	Access	Description
dataExtent	struct massif::MapBounds	read-only	Returns the extent of the tiles in this data source. The bounds are in coordinate system of the projection of the data source.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this datasource. Over it the datasource will not be "drawn"
maxZoom	integer	read-only	Returns the maximum zoom level supported by this data source.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the data source meta data map; changes to it are not reflected in the source. The map is attached to every loaded tile, e.g. "dem_encoding" ("mapbox" or "terrarium") selects the elevation decoder. A wrapper source with no map of its own answers with its wrapped source's.
minZoom	integer	read-only	Returns the minimum zoom level supported by this data source.
projection	object projections.Projection	read-only	Returns the projection of this tile source.

Method	Arguments	Returns
getMetaDataElement	key: string	json
loadTile	tile: tile	object
setMetaDataElement	key: string, value: json	void

"memory-cache" — MemoryCacheTileDataSource

{"type": "memory-cache", "source": …}

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

Inherited from CacheTileDataSource:

Property	Type	Access	Description
capacity	integer	read/write
dataSource	object datasources.TileDataSource	read-only	Returns the original data source that the cache uses.

Inherited from TileDataSource:

Property	Type	Access	Description
dataExtent	struct massif::MapBounds	read-only	Returns the extent of the tiles in this data source. The bounds are in coordinate system of the projection of the data source.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this datasource. Over it the datasource will not be "drawn"
maxZoom	integer	read-only	Returns the maximum zoom level supported by this data source.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the data source meta data map; changes to it are not reflected in the source. The map is attached to every loaded tile, e.g. "dem_encoding" ("mapbox" or "terrarium") selects the elevation decoder. A wrapper source with no map of its own answers with its wrapped source's.
minZoom	integer	read-only	Returns the minimum zoom level supported by this data source.
projection	object projections.Projection	read-only	Returns the projection of this tile source.

Method	Arguments	Returns
getMetaDataElement	key: string	json
loadTile	tile: tile	object
setMetaDataElement	key: string, value: json	void

"merged-mbvt" — MergedMBVTTileDataSource

{"type": "merged-mbvt", "source": …, "source2": …}

Key	Type	Always required	Notes
source	object std::shared_ptr<TileDataSource>	yes	an id of kind source, or an inline spec
source2	object std::shared_ptr<TileDataSource>	yes	an id of kind source, or an inline spec

Inherited from TileDataSource:

Property	Type	Access	Description
dataExtent	struct massif::MapBounds	read-only	Returns the extent of the tiles in this data source. The bounds are in coordinate system of the projection of the data source.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this datasource. Over it the datasource will not be "drawn"
maxZoom	integer	read-only	Returns the maximum zoom level supported by this data source.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the data source meta data map; changes to it are not reflected in the source. The map is attached to every loaded tile, e.g. "dem_encoding" ("mapbox" or "terrarium") selects the elevation decoder. A wrapper source with no map of its own answers with its wrapped source's.
minZoom	integer	read-only	Returns the minimum zoom level supported by this data source.
projection	object projections.Projection	read-only	Returns the projection of this tile source.

Method	Arguments	Returns
getMetaDataElement	key: string	json
loadTile	tile: tile	object
setMetaDataElement	key: string, value: json	void

"multi" — MultiTileDataSource

{"type": "multi", "maxOpenedPackages": …}
{"type": "multi"}

Key	Type	Always required	Notes
maxOpenedPackages	integer	no	defaults to 4

Inherited from TileDataSource:

Property	Type	Access	Description
dataExtent	struct massif::MapBounds	read-only	Returns the extent of the tiles in this data source. The bounds are in coordinate system of the projection of the data source.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this datasource. Over it the datasource will not be "drawn"
maxZoom	integer	read-only	Returns the maximum zoom level supported by this data source.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the data source meta data map; changes to it are not reflected in the source. The map is attached to every loaded tile, e.g. "dem_encoding" ("mapbox" or "terrarium") selects the elevation decoder. A wrapper source with no map of its own answers with its wrapped source's.
minZoom	integer	read-only	Returns the minimum zoom level supported by this data source.
projection	object projections.Projection	read-only	Returns the projection of this tile source.

Method	Arguments	Returns
add	datasource: handle, tileMask: string	void
getMetaDataElement	key: string	json
loadTile	tile: tile	object
remove	datasource: handle	bool
setMetaDataElement	key: string, value: json	void

"ordered" — OrderedTileDataSource

{"type": "ordered", "source": …, "source2": …}

Key	Type	Always required	Notes
source	object std::shared_ptr<TileDataSource>	yes	an id of kind source, or an inline spec
source2	object std::shared_ptr<TileDataSource>	yes	an id of kind source, or an inline spec

Inherited from TileDataSource:

Property	Type	Access	Description
dataExtent	struct massif::MapBounds	read-only	Returns the extent of the tiles in this data source. The bounds are in coordinate system of the projection of the data source.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this datasource. Over it the datasource will not be "drawn"
maxZoom	integer	read-only	Returns the maximum zoom level supported by this data source.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the data source meta data map; changes to it are not reflected in the source. The map is attached to every loaded tile, e.g. "dem_encoding" ("mapbox" or "terrarium") selects the elevation decoder. A wrapper source with no map of its own answers with its wrapped source's.
minZoom	integer	read-only	Returns the minimum zoom level supported by this data source.
projection	object projections.Projection	read-only	Returns the projection of this tile source.

Method	Arguments	Returns
getMetaDataElement	key: string	json
loadTile	tile: tile	object
setMetaDataElement	key: string, value: json	void

"persistent-cache" — PersistentCacheTileDataSource

{"type": "persistent-cache", "source": …, "databasePath": …}

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

Property	Type	Access	Description
cacheOnlyMode	boolean	read/write	Returns the state of cache only mode.
open	boolean	read-only	Returns the status of the cache database.

Inherited from CacheTileDataSource:

Property	Type	Access	Description
capacity	integer	read/write
dataSource	object datasources.TileDataSource	read-only	Returns the original data source that the cache uses.

Inherited from TileDataSource:

Property	Type	Access	Description
dataExtent	struct massif::MapBounds	read-only	Returns the extent of the tiles in this data source. The bounds are in coordinate system of the projection of the data source.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this datasource. Over it the datasource will not be "drawn"
maxZoom	integer	read-only	Returns the maximum zoom level supported by this data source.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the data source meta data map; changes to it are not reflected in the source. The map is attached to every loaded tile, e.g. "dem_encoding" ("mapbox" or "terrarium") selects the elevation decoder. A wrapper source with no map of its own answers with its wrapped source's.
minZoom	integer	read-only	Returns the minimum zoom level supported by this data source.
projection	object projections.Projection	read-only	Returns the projection of this tile source.

Method	Arguments	Returns
clear	—	void
getMetaDataElement	key: string	json
loadTile	tile: tile	object
setMetaDataElement	key: string, value: json	void
startDownloadArea	bounds: json, minZoom: int, maxZoom: int, fetchDelay: int	void
stopAllDownloads	—	void

Event	Payload	Consumable
download.completed	—	no
download.failed	TileDownloadInfo	no
download.progress	TileDownloadInfo	no
download.started	TileDownloadInfo	no

"pmtiles" — PMTilesTileDataSource

{"type": "pmtiles", "minZoom": …, "maxZoom": …, "path": …}
{"type": "pmtiles", "path": …}

Key	Type	Always required	Notes
minZoom	integer	no	defaults to 0
maxZoom	integer	no	defaults to 24
path	string	yes

Inherited from TileDataSource:

Property	Type	Access	Description
dataExtent	struct massif::MapBounds	read-only	Returns the extent of the tiles in this data source. The bounds are in coordinate system of the projection of the data source.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this datasource. Over it the datasource will not be "drawn"
maxZoom	integer	read-only	Returns the maximum zoom level supported by this data source.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the data source meta data map; changes to it are not reflected in the source. The map is attached to every loaded tile, e.g. "dem_encoding" ("mapbox" or "terrarium") selects the elevation decoder. A wrapper source with no map of its own answers with its wrapped source's.
minZoom	integer	read-only	Returns the minimum zoom level supported by this data source.
projection	object projections.Projection	read-only	Returns the projection of this tile source.

Method	Arguments	Returns
getMetaDataElement	key: string	json
loadTile	tile: tile	object
setMetaDataElement	key: string, value: json	void

"point-detail" — PointDetailTileDataSource

{"type": "point-detail", "source": …, "layer": …, "detailZoom": …}

Key	Type	Always required	Notes
source	object std::shared_ptr<TileDataSource>	yes	an id of kind source, or an inline spec
layer	string	yes
detailZoom	integer	yes	defaults to 14

Property	Type	Access	Description
detailZoom	integer	read/write	Returns the zoom whose tiles are read.
layerName	string	read-only	Returns the layer that is rebuilt.
maxDetailLevels	integer	read/write	Returns how many zoom levels below the requested tile this will reach.
maxFeatures	integer	read/write	Returns how many features a rebuilt tile may carry.
rankProperty	string	read/write	Returns the property a rebuilt tile's features are ranked by.

Inherited from TileDataSource:

Property	Type	Access	Description
dataExtent	struct massif::MapBounds	read-only	Returns the extent of the tiles in this data source. The bounds are in coordinate system of the projection of the data source.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this datasource. Over it the datasource will not be "drawn"
maxZoom	integer	read-only	Returns the maximum zoom level supported by this data source.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the data source meta data map; changes to it are not reflected in the source. The map is attached to every loaded tile, e.g. "dem_encoding" ("mapbox" or "terrarium") selects the elevation decoder. A wrapper source with no map of its own answers with its wrapped source's.
minZoom	integer	read-only	Returns the minimum zoom level supported by this data source.
projection	object projections.Projection	read-only	Returns the projection of this tile source.

Method	Arguments	Returns
getMetaDataElement	key: string	json
loadTile	tile: tile	object
setMetaDataElement	key: string, value: json	void

Base classes

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

CacheTileDataSource

Property	Type	Access	Description
capacity	integer	read/write
dataSource	object datasources.TileDataSource	read-only	Returns the original data source that the cache uses.

Inherited from TileDataSource:

Property	Type	Access	Description
dataExtent	struct massif::MapBounds	read-only	Returns the extent of the tiles in this data source. The bounds are in coordinate system of the projection of the data source.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this datasource. Over it the datasource will not be "drawn"
maxZoom	integer	read-only	Returns the maximum zoom level supported by this data source.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the data source meta data map; changes to it are not reflected in the source. The map is attached to every loaded tile, e.g. "dem_encoding" ("mapbox" or "terrarium") selects the elevation decoder. A wrapper source with no map of its own answers with its wrapped source's.
minZoom	integer	read-only	Returns the minimum zoom level supported by this data source.
projection	object projections.Projection	read-only	Returns the projection of this tile source.

Method	Arguments	Returns
getMetaDataElement	key: string	json
loadTile	tile: tile	object
setMetaDataElement	key: string, value: json	void

TileDataSource

Property	Type	Access	Description
dataExtent	struct massif::MapBounds	read-only	Returns the extent of the tiles in this data source. The bounds are in coordinate system of the projection of the data source.
maxOverzoomLevel	integer	read/write	Gets the current maximum overzoom level for this datasource. Over it the datasource will not be "drawn"
maxZoom	integer	read-only	Returns the maximum zoom level supported by this data source.
metaData	struct std::map<std::string, massif::Variant>	read/write	Returns a copy of the data source meta data map; changes to it are not reflected in the source. The map is attached to every loaded tile, e.g. "dem_encoding" ("mapbox" or "terrarium") selects the elevation decoder. A wrapper source with no map of its own answers with its wrapped source's.
minZoom	integer	read-only	Returns the minimum zoom level supported by this data source.
projection	object projections.Projection	read-only	Returns the projection of this tile source.

Method	Arguments	Returns
getMetaDataElement	key: string	json
loadTile	tile: tile	object
setMetaDataElement	key: string, value: json	void

VectorDataSource

Property	Type	Access	Description
dataExtent	struct massif::MapBounds	read-only	Returns the extent of the data of this data source. The bounds are in coordinate system of the projection of the data source.
projection	object projections.Projection	read-only	Returns the projection used by this data source.