diff -r 000000000000 -r 5fda18b64dcb INSTALL --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/INSTALL Wed Sep 26 17:50:53 2007 -0400 @@ -0,0 +1,94 @@ +The Fractal Realizer +May 25, 2007 + +The Fractal Realizer has been rewritten in Fortran-90. There are +no longer any pieces of code in C. The visualization feature (using +DrawPixmap) has been eliminated, since maps can be viewed as XPM files +after running the model. The new code has been compiled and tested +with gfortran under Linux on an Athlon-64 box. Example scripts and +data are available in directories below examples/. The code is in +the src/ directory. The previous README file is still included here +as README.previous. + +Installation +------------ +If you are using gfortran under Linux, simply do the following to build +and install the Fractal Realizer. Download the code and examples: + + $ wget http://www.geobabble.org/~hnw/frdist.90 + +Then extract the code and examples: + + $ tar xvzf frdist90.tar.gz + +Next, build the code: + + $ cd frdist90/src + $ make + +This will produce the binary program called realizer. To install the +Fractal Realizer in /usr/local/bin: + + $ sudo make install + +Execution +--------- + +The Fractal Realizer has many options, and some of these are mutually +exclusive. Simply running the executable begins a cascade of questions +from the model which query the user to set up the options for the +simulation run. Responses to the questions direct the subsequent +questions, changing the way that the option tree is traversed. This +verbose interaction mode is a good way to become familiar with the wide +array of Fractal Realizer options. After all questions are answered, +the simulation begins. + +Because answering all of the input questions for each run would be +tedious, the Fractal Realizer writes a script file, inpout.scr, containing +the input answers from the last run. Thus, the last simulation can be +repeated by issuing the command: + + $ realizer < input.scr + +To change a few input settings, it is not necessary to wade through all +of the input questions again. Instead, simply edit the input.scr script +file directly, and then re-run the simulation using the modified script +file. Mnemonic comments within the script file aid in such editing +process. + +A number of demonstration .scr script files are included in the in the +examples/ directory, and running these "canned" examples is a good way to +test the installation, as well as to see the capabilities of the Fractal +Realizer. Final landscapes and tie maps can be output in several formats, +including XPM and GRASS. + +The FR program uses a heap sort to sort the entire map to find the +highest probability sites, so execution time will increase rapidly as +the size of the map is increased. Execution time also increases with +increasing numbers of categories in the map. Because of the midpoint +displacement algorithm for generating (pseudo)fractals, the maps must +be square, with sides of (2**n)+1. However, the use of constraint masks +will permit oddly-shaped and smaller synthetic maps to be generated +while still preserving both p and the fractal dimension of each category. + +The Fractal Realizer has proven useful and stimulating. Be sure +to read and cite our paper in Conservation Ecology available at +http://www.ecologyandsociety.org/vol6/iss1/art2/ + +Bill and Forrest +------------------------------------------------------------------------------- +William W. Hargrove +Eastern Forest Environmental Threat Assessment Center +USDA Forest Service +Southern Research Station +200 WT Weaver Boulevard +Asheville, NC 28804-3454 +------------------------------------------------------------------------------- +Forrest Hoffman mailto:forrest@climatemodeling.org +Oak Ridge National Laboratory mailto:forrest@computer.org +Climate & Carbon Research Institute http://www.climatemodeling.org/~forrest +Computer Science & Mathematics Div. (865) 576-7680 voice +Building 5600, Room C221, MS 6016 (865) 576-5491 fax +P.O. Box 2008 Deliveries: Bethel Valley Road +Oak Ridge TN 37831-6016 35� 55' 23" N 84� 19' 20" W +-------------------------------------------------------------------------------