function get() {
	/* eslint-disable no-invalid-this */
	var scale = this.scale;
	return pos;

	/**
	* Maps a value to a coordinate value.
	*
	* @private
	* @param {*} d - datum
	* @returns {number} pixel value
	*/
	function pos( d ) {
		var p = scale( d );
		debug( 'Value: %d => Pixel: %d.', d, p );
		return p;
	}
}
Returns a function to map values to coordinate values.

@private
@returns {Function} map function