On this page you will find data-based computer programs
that can be used to visualize composition, growth, and proposed
management alternatives in forested ecosystems. Most
were written by Wayne D. Shepperd at the U. S. Forest Service,
Rocky Mountain Forest and Range Experiment Station, Fort
collins, CO. These programs were written in BASIC,
then converted to executable files. To use them, type
the program name and press return if you are using DOS,
or double-click on the *.EXE file in Windows. Some
programs are interactive and others require data files.
Example data, documentation, and output files are included
for some programs and have similar names, but with .DAT,
.TXT, and .OUT extensions. Most programs also tell you what
variables are needed in a data file when you run them. NOTE,
program files and data files must be in the same directory
to run properly.
noted, programs require all numeric data in sequential order separated
by one or more blanks. No empty fields are allowed. Use
zero's for missing data. The end of file marker must be at the
end of the last line of data, not at the beginning of a new line.
If you are unfamiliar
with BASIC, the following commands will help you if a program hangs
up, or if you want to stop it. When an error is encountered,
BASIC prints an error message, followed by an "OK".
To get back to DOS when this occurs, type SYSTEM,
then press [Enter].
If you want to stop a program while it is running, press
to get the "OK"
message. Running these programs in Windows may require closing
the window to exit.
DESCRIPTIONS AND DOWLOADING
To read .TXT
files, simply click on the filenames below. To download
files, press SHIFT
while clicking over the filenames to bring up a Save As
files will automatically bring up Save As windows when their
names are clicked.
- Classifies aspen stands based on stand growth characteristics
and displays possible management considerations.
- Growth and yield model which projects expected stand conditions
in southwestern mixed conifer and ponderosa pine stands, including
the effects of dwarf mistletoe. Stand management options
include both even- and uneven-aged cutting methods. (Edminster
et al. 1990. USFS Res. Pap. RM-297).
(167 KB; self-extracting compressed files; expands to 12 f
iles totalling 410 KB)
-Illustrates the forest conditions predicted by all variants of
the Forest Vegetation Simulation (FVS) forest growth and yield
(186 KB; self-extracting compressed files; expands to 28 files
totalling 525 KB)
Draws crown profiles of the model output produced by GENGYM.
Can be downloaded as part of the GENGYM
aerial photos from USGS topo maps, adjusts scale to any elevation,
and computes acreage of areas measured on a photo, or a map.
the user visualize growth and stocking patterns in mature subalpine
forests in the central and southern Rockies. Especially
useful to view plot characteristics without the influence of the
surrounding forest and is very helpful in visualizing species
composition, recruitment, mortality, successional patterns, and
other attributes not readily apparent in tabular inventory data.
VGA monitor) Computes the number of trees in each 2-inch diameter
class for an uneven-aged stand, given a Q factor, maximum and
minimum diameters, and residual basal area. Plots a cross
section of tree profiles along the side of one acre. A lot
of fun, if you have a VGA monitor!
variable radius BAF cruise data from multiple plots and produces
a stand table of density, cubic, and scribner volumes by height
and diameter class. Volume equations are from RM Station
publications. The program can produce a stand table combining
all species, or with repeated runs, produce a table for each species
in the stand. Output is saved as a user-defined ASCII file
for later printing or viewing.
and compass traverse summary. Computes error of closure
and acreage of traversed area from a data file containing azimuth
compass bearings, slope distances in feet, and % slope.
Outputs X and Y coordinates in file XYDATA.OUT which can be used
to plot the traverse in commercial graphics or statistical
- Computes tree heights given negative % angle to
the base, positive % angle to the tip and slope distance to a
tree. Allows clinometer readings to be taken wherever a
tree can be seen.