Controllet: same datasets and different visualization with bar and column charts when browser's zoom is not set to 100%

[pinapalmieri]

In the Controllet, the "Alberi Monumentali" dataset (available at the link: http://ckan.routetopa.eu:8080/dataset/40311576-afd4-4d45-a7bf-d4cf2a630b7c/resource/e5acc3cc-06d0-4520-b1d7-fbf29da29c02) shows different visualization between bar and column charts (see screenshots below).

i.e:

In particular the zoom setting of the "Chrome" browser is 110% , the column char shows an heigh different of the "platanus acerifolia" tree (the maximum height ofthis tree is 37 )

(the colum chart works fine with 100% zoom setting of the "Chrome" browser, see screenshot below

)
Below the dataset:

[rended]

It's not a bug, just highstock approximations, we cannot do anything.