sent from a phone
> On 12. Jul 2017, at 23:46, Devon Fyson <[email protected]> wrote: > > For the trunk diameter I plotted the data and included it on the wiki. When > you say it's a horizontal line with a spike for the outliers, it sounds like > you sorted it and plotted the diameter as a function of the line number? Id > say the trunk diameters of even 2.5m sound a little unrealistic for Ottawa. > That's an 8 foot wide trunk! I'm curious to compile a map of these huge trees > and have a look. I have been rethinking the diameter vs. circumference question and now think it might be better to not do any conversions but rather add the data in a way you get it from the source. Reason is that according to the species and individual circumstances, for the shape of the lower trunk there can be big variations, especially for older trees, because some instances are all but circular in section, so that the circumference is much bigger than it would be calculated from the diameter based on the circle formula. Diameter from this point of view is a better indicator for age/size than the circumference, because it depends less on the shape and you might reasonably expect the data creator has already contemplated/normalized shape anomalies. Cheers, Martin _______________________________________________ Imports mailing list [email protected] https://lists.openstreetmap.org/listinfo/imports
