The image includes the following elements which are believed to have the following copyright statuses:

• Old map of Haarlem. Taken from scan-page 471 of Geschiedenis en beschrijving van Haarlem, published in Haarlem in 1874, via BL mechanical curator Flickr account [2]. Original PD-Old-100. Scan released CC0 by the BL; we would in any case consider it to be PD-Art.
• Modern map. OpenStreetMap via MapQuest. "OpenStreetMap data and tiles are provided through the MapQuest Open Services pursuant to the Creative Commons – Attribution-Sharealike License. 2.0". [3].
• Locations of georeferencing control point pins. Added by User:Basvb. Considered by the British Library to be CC0.
• British Library logo. PD-Textlogo.
• Georeferencer application elements. Effort has been made to exclude these as far as possible through cropping. It is submitted that what remains -- the placement of the two map images adjacent to each other, the map source selection drop-down box, and the two pairs of + and - buttons to control magnification, are all conventional and (both individually and together) lack sufficiently extensive original creative expression to give rise to an independent copyright in the image under U.S. law.