I can only say that when "superalberi" has measured tall European trees, which have also been measured by others, the results have been rather close. A few examples from his recent Portugal trip:http://www.monumentaltrees.com/en/prt/c ... nas/23690/Eucalyptus globulus
, 63.1m by superalberi, 62.4m by John Weightman in 2015.http://www.monumentaltrees.com/en/prt/c ... anas/8327/Eucalyptus viminalis
, 62.3m by superalberi, 65m by Dean Nicolle in 2010.http://www.monumentaltrees.com/en/prt/c ... anas/8314/Eucalyptus diversicolor
, 73m by superalberi, 72.9m by Syd Howells in 2015 (the latter with climbing & tape). The tallest tree of Europe.http://www.monumentaltrees.com/en/prt/c ... saco/6443/Eucalyptus regnans
, 64.9m by superalberi, 64.5m by Dean Nicolle in 2010.
And one tree from Canary Islands:http://www.monumentaltrees.com/en/esp/c ... flor/3482/Pinus canariensis
, 55.5m by superalberi, 55.6m by Nardo Kaandorp. I got 56.7m with TP 200X but I am sure superalberi and Nardo have missed the tallest twig, which is hidden by other twigs when looking from the most obvious measuring place. See http://www.monumentaltrees.com/en/photos/56161/
and the comment below the photo.
It is also possible that superalberi has marked a false point on the map, either accidentally or if he cannot locate the place on the map. Myself I don't have a gps unit and sometimes have to guess the right place but I then write in the description "the location is not exact".
However, I must say that the credibility of "superalberi" is slightly decreased by the fact that he does not answer to messages. For example, I have tried to ask, which laser unit he uses without an answer. I will send him a message and ask if he wants to comment this discussion.
"superalberi"=Andrea Maroè, here his/their website: http://www.superalberi.it/?lang=en