Label placement by specifying optional X, Y position

[artemp]

Position of labels is sometimes defined in datasource. It could be a great enhancement to be able specify X, Y items name in the attribute table to use for label placement.

[gravitystorm]

See also #828

[rclark]

mapbox/carto#276 gives a concrete use-case for this in making geologic maps

[springmeyer]

Thanks for the ideas @rclark - we are considering deeper re-writes to make many more options expressions, but this work is still a ways off. We'll keep your request in mind.

[springmeyer]

Supported now in mapnik 3.x, closing.