What is the reason of image rejection?

Could someone explain to me which elements of the image or description might have caused the rejection?
Title: Cotswold. Administrative area of United Kingdom highlighted and outlined on a darkened colored elevation map
Keywords: Cotswold,United Kingdom,Europe,physical,colored,shader,elevation,overlay,outline,Cirencester,Charlton Kings,Cheltenham,Bishop's Cleeve,Churchdown,Tewkesbury,Evesham,Stroud,Gloucester,Pershore,Royal Wootton Bassett,Stonehouse,Highworth,Swindon,Carterton,Dursley,Malvern,Witney,Ledbury,Yate,administrative,boundaries,region,country,location,territory,earth,planet,atlas,border,divisions,geography,geographic,map,cartography,visualization,nature,educational,science,zoom
Here's the reviewer's comment:
Thank you for the opportunity to review your image.
The review determined that the work contains copyrighted elements
and therefore cannot be accepted for the collection.
Copyrighted elements may appear in the image or in its description, title, or keywords.
For more information, please see our intellectual property guidelines.
