Borneo of Kutai

Studies have shown that trees contribute as much as 27% of the appraised land value in certain markets.[36]
Basic tree values (varies by region)[37] diameter
(inches) value
(1985 US$)
10 $1,729
14 $3,388
18 $5,588
26 $11,682
30 $15,554

These most likely use diameter measured at breast height, 4.5 feet (140 cm) above ground—not the larger base diameter. A general model for any year and diameter is Value = 17.27939*( diameter ^2)*1.022^( year -1985) assuming 2.2% inflation per year.[38] (Note, the right side of this equation is written to paste into Excel or Google to perform the calculation.) Extrapolations from any model can cause problems, so tree value estimates for diameters larger than 30 inches might have to be capped so trees do not not exceed 27% of the total appraised property value.