Map.md

new mapnik.Map(width, height, [srs])

Returns a new Map object.

• width: An integer width for the map. Normally for tiled rendering this value is some power of 2, like 256 or 512 and matches the value for height.

• height: An integer height for the map. Normally for tiled rendering this value is some power of 2, like 256 or 512 and matches the value for width.

• srs (optional): A string. If provided, this sets the Map spatial reference system (aka projection). The format is the proj4 syntax. The default if you do not provide a value is +proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs (which is equivalent to the shorthand of +init=epsg:4326 and comes from Mapnik core). The most common srs for tiled rendering is spherical mercator which is +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over (which is equivalent to the shorthand of +init=epsg:3857). Note: Mapnik >= 2.2.x has special handling for transforming between these common projections and detects them here.

Map.fromStringSync(xml, [options])

Map.fromString(xml, [options], [callback])

Options:

• strict: A boolean to indicate that path related errors should be raised on XML parsing. Default: false.

• base: A filepath (string) for Mapnik to resolve paths upon. Default: null.

Map.render(surface, [options,] [callback])

Renders the data in the map to a given surface. A surface can either be a mapnik.VectorTile, a mapnik.Image, or a mapnik.Grid.