Stand height is an optional spatial data theme that is used for computing wind reduction to midflame height and spotting distances from torching trees. This value is not that of the tallest tree nor an average height of all trees. A good estimate at stand height would be the average height of the dominant and co-dominant trees in a stand.
The values in the raster theme can be either integers or decimal values, meters or feet. The precision of the fire behavior calculations are limited to the nearest 1/10th meter or foot. Thus, if you have integer values and you want greater precision you should use the calculator features of your GIS to multiply the original height units by 10 and select meters*10 or feet*10 in the "Landscape (.LCP) File Generation" dialog box. This conversion is optional for decimal stand height values.
Within the United States, pre-made Stand Height Themes can be found at www.landfire.gov.