isabella232 / tilelive

fast interface to tiles with pluggable backends

tilelive.js

IMPORTANT: This was forked from an older mapbox version of tilelive that still worked with tilemill. It has also had minor enhnacements had had all of its dependent modules upgraded.

The original readme is below.

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tilelive.js is an interface for tilestore modules for node.js. It defines an API to interact with implementations for a particular tile store.

Backends

• MBTiles
• TileJSON
• Mapnik

Usage

Tilelive doesn't ship with any Tilestore backends by default. To use a particular backend, register it with tilelive using require('[implementation]').registerProtocols(tilelive);.

• tilelive.list(source, callback): Lists all tilesets in a directory. source is a folder that is used by registered implementations to search for individual tilesets. callback receives an error object (or null) and a hash hash with keys being Tilestore IDs and values being Tilestore URIs. Example:

{
    "world-light": "mbtiles:///path/to/file/world-light.mbtiles",
    "mapquest": "tilejson:///path/to/file/mapquest.tilejson"
}

• tilelive.findID(source, id, callback): Looks for a particular tileset ID in a directory. callback receives an error object (or null) and the URI of the tileset.

• tilelive.load(uri, callback): Loads the Tilestore object associated with the specified uri. callback receives an error object (or null) and the Tilestore object.

• tilelive.info(uri, callback): Loads the Tilestore object associated with the specified uri and retrieves its metadata in a TileJSON compliant format. callback receives an error object (or null), the metadata hash and the Tilestore object.

• tilelive.all(source, callback): Loads metadata in a TileJSON compliant format for all tilesets in the source directory. callback receives an error object (or null) and an array with TileJSON metadata about each tileset in that directory.

• tilelive.verify(tilejson): Validates a TileJSON object and returns error objects for invalid entries.

• tilelive.copy(args, callback): Copies data from one tilestore into another tilestore. args is a configuration hash with these keys:

  • source: a Tilestore object that implements the Tilesource interface
  • sink: a Tilestore object that implements the Tilesink interface
  • bbox: an array with W/S/E/N boundaries in WGS84 format (-180...180, -90...90)
  • minZoom: the minimum zoom for data to be copied (inclusive)
  • maxZoom: the maximum zoom for data to be copied (inclusive)
  • concurrency: (default: 100) how many data objects should be copied simultaneously.
  • callback: (optional) called when copying is complete
  • tiles: copy tiles (true or false)
  • grids: copy grids (true or false)

  This function returns an EventEmitter that has these events emitted:

  • warning: An error occurred during copying. err is the first argument.
  • error: An error occured while initializing the tilesource/tilesink.
  • finished: Copying completed

  The EventEmitter also has these properties. They are updated continuously while copying. Check them occassionally to report status to the user.

  • copied: Number of elements that have been copied so far
  • failed: Number of elements that couldn't be copied.
  • total: Total number of elements to be copied.
  • started: Timestamp of when the action started in milliseconds after epoch

bin/tilelive

tilelive can be used to copy data between tilestores. For a full list of options, run bin/tilelive.

Tests

To run the tests

npm test

Usage

See examples for examples of a tilelive powered server.