Anaglyph images are used to provide a stereoscopic 3D effect when viewed with 2 colour glasses, usually cyan and red. The images are made up of these two colour layers superimposed but offset to produce a depth effect. This allows the viewer to perceive features in three dimensions, as they were intended to be viewed when the imagery was originally taken.
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CORONAVIRUS (COVID-19) UPDATE: In recognition of the essential restrictions and measures imposed by the Scottish and UK Governments, HES has closed all of its sites, depots and offices with immediate effect. NCAP is no longer processing new orders for not-yet-digitised aerial imagery. Website imagery will continue to be available for purchase. Read our latest statement