Please add spaces between words: AlmostanendlesssourceofsuchphotographsisGoogleEarth,aswellasanyotheravailablesourcesofaerialphotos(aerialarchaeologistsmayfindalotthroughtheirarchives).
Almost an endless source of such photographs is Google Earth, as well as any other available sources of aerial photos (aerial archaeologists may find a lot through their archives).