The following images are obtained from the recent releases of open data LIDAR by The Environment Agency and Natural Resources Wales. I've used this amazing dynamic map which has been created to use the open data. Thank you to all concerned for your time and resources!
I have gone through all sites categorised as Henges on www.themodernantiquarian.com checking if a) LIDAR exists and b) they are visible to my untrained eye. This has unfortunately trimmed 70% or so of the listed henges.
All henges in Scotland and Ireland are right out. A high percentage of those left are missing LIDAR. Thornborough North and Central, Arbor Low, The Bull Ring and half of Mayburgh are some of the better known casualties. Those where LIDAR exists but we don’t see them can be categorized as small henges less than 20m wide which presumably have shallower ditches, lost to quarrying, buildings and agriculture.
Each picture is at maximum resolution, so you can download two (or twenty) and directly compare them.
Posted by juamei
7th January 2016ce
Edited 8th January 2016ce
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