Practice With Forest Models

Last update: 05 Feb 1997, 5 pm

This is an adapted version of lab guide by Prof. Miguel Acevedo. The complete version can be found at: http://www.geog.unt.edu/~acevedo/courses/5400/week9/lab09.htm.

Goals of this session:





Getting ready

Warning: read this getting ready section before doing anything.

  • This session will rely on TIME-ZERO, NHOOD, DYNLAYER, MOSAIC, ZELIG and IDRISI
  • We will do a brief explanation/demo of NHOOD, MOSAIC in the lab
  • Remember to start the session by creating lab9 directory to store the files for this lab session
  • within lab9 make several subdirectories to keep all the forthcoming files sorted out
  • If you go for the easy option: at the h:\ prompt type
  • If you go for the harder option: at the h:\ prompt type




  • Individual based models: ZELIG and/or TIME-ZERO

    You will exercise one of these two (your choice):

    Option 1: Deterministic and lumped JABOWA

    At the h:\lab9\t0hubro prompt, run gab menu, then select and run time-zero

    Option 2: ZELIG





    Successional Dynamics: SEEM and/or DYNLAYER

    You will exercise one of these two (your choice):

    Option 1: Grassland succession, SEEM

    Option 2: Forest succession, DYNLAYER





    Landscape dynamics: MOSAIC and NHOOD

    You will exercise one of these two (your choice):

    Option 1: NHOOD

    Option 2: MOSAIC

    Files for this part are contained in s:\mosaic\roles\idrisi or in download\mosaic\roles\idrisi

    Copy the following files to your h:\lab9\mosaic

    If remote: download and unzip files in download\mosaic\roles\idrisi

    The input files are:

    The pc version of the model will produce output in IDRISI *.img format; the file name convention is Sxx-Tyy.img, where xx is state number (01, 02, 03, 04 or 05 in this case) and yy is the time (00,10,20,30 in this case). Current version of mosaic does not write the *.doc file

    To run just type mosaic

    The program will inform you of run status with short message to screen every time it writes output maps

    At the end of the run type dir *.img and make sure all the output maps are there (you should have 5 states x 4 time intervals = 20 *.img files)

    Open one of these files in the editor or the notepad, say s01-t00.img

    Should look like this

      25 
      25 
       0 
       0 
      50 
      50 
      25 
      25 
     100 
      75 
      50 
      50 
     100 
     100 
      75 
      50 
    

    Which is an ascii idrisi *.img file, the numbers correspond to the cell values by row, that is to say: the map is really like this

      25  25  0  0 
      50  50 25 25 
     100  75 50 50 
     100 100 75 50 
    

    In the next section we will learn idrisi and then you will understand how to display the maps

    If you are following this option, then do this for part 3 of homework 9:





    GIS and remote sensing: IDRISI

    Copy the following files from s:\idriexer to h:\lab9\idrisi

    Brief intro to IDRISI





    Miguel F. Acevedo

    acevedo@unt.edu

    Copyright © 1996 Miguel F. Acevedo