| java.lang.Object | ||
| ↳ | com.carto.datasources.TileDataSource | |
| ↳ | com.carto.datasources.GeoJSONVectorTileDataSource | |
Class Overview
A tile data source that builds vector tiles from GeoJSON inputs.
Summary
| Public Constructors | |||||||||||
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GeoJSONVectorTileDataSource(int minZoom, int maxZoom)
Constructs a GeoJSONVectorTileDataSource object.
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| Public Methods | |||||||||||
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| int |
createLayer(String name)
Creates a new layer with specified name.
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| synchronized void | delete() | ||||||||||
| void |
deleteLayer(int layerIndex)
Deletes an existing layer.
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| MapBounds |
getDataExtent()
Returns the extent of the tiles in this data source.
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| TileData |
loadTile(MapTile mapTile)
Loads the specified tile.
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| void |
setLayerFeatureCollection(int layerIndex, Projection projection, FeatureCollection featureCollection)
Sets the feature collection of the specified layer.
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| void |
setLayerGeoJSON(int layerIndex, Variant geoJSON)
Sets the features of the specified layer.
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[Expand]
Inherited Methods | |||||||||||
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From class
com.carto.datasources.TileDataSource
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From class
java.lang.Object
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Public Constructors
public GeoJSONVectorTileDataSource (int minZoom, int maxZoom)
Constructs a GeoJSONVectorTileDataSource object.
Note: EPSG3857 projection is used.
Parameters
| minZoom | The minimum zoom level supported by this data source. |
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| maxZoom | The maximum zoom level supported by this data source. |
Public Methods
public int createLayer (String name)
Creates a new layer with specified name.
Parameters
| name | The name for the layer. |
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Returns
- The layer index of the created layer.
Throws
| Exception | If an error occured during creation of the layer. |
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| IOException |
public synchronized void delete ()
public void deleteLayer (int layerIndex)
Deletes an existing layer.
Parameters
| layerIndex | The index of layer to delete. |
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public MapBounds getDataExtent ()
Returns the extent of the tiles in this data source.
The bounds are in coordinate system of the projection of the data source.
Returns
- The extent of the data source.
public TileData loadTile (MapTile mapTile)
Loads the specified tile.
Note: the tile coordinate system used here is vertically flipped relative to layer tile coordinate system.
Parameters
| mapTile | The tile to load. |
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Returns
- The tile data. If the tile is not available, null may be returned.
public void setLayerFeatureCollection (int layerIndex, Projection projection, FeatureCollection featureCollection)
Sets the feature collection of the specified layer.
Parameters
| layerIndex | The index of the layer. A layer with empty name will be created if it does not exist yet. |
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| projection | Projection for the features in featureCollection. Can be null if the coordinates are based on WGS84. |
| featureCollection | The feature collection for the specified layer. |
Throws
| Exception | If an error occured during updating the layer. |
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| IOException |
public void setLayerGeoJSON (int layerIndex, Variant geoJSON)
Sets the features of the specified layer.
Parameters
| layerIndex | The index of the layer. A layer with empty name will be created if it does not exist yet. |
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| geoJSON | A geojson type variant that MUST contain single FeatureColletion element. |
Throws
| Exception | If an error occured during updating the layer. |
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| IOException |