To use GISMO, the user needs to supply a general map (or "thumbnail map") of the area of interest, as well as files of data points for that area taken in a geographic survey. The user may then select any arbitrary subregion of the thumbnail map by outlining a box on the thumbnail map with the mouse. GISMO will then display in a new window a detailed terrain map of that subregion, constructed from the files of data points. This terrain map will give a two-dimensional, "bird's-eye-view" of the subregion, and indicate the elevations of the land by using a system of gradated colors. For instance, land that is at sea-level might appear dark green, a high mountain peak white, and a low valley light green.
GISMO is currently being developed to handle a first-run test case: the area of interest is the North Shore Mountains of the Vancouver area. Our client has supplied the necessary topographical data points. Additionally, the user may specify another area of interest and provide the necessary data files.
Next decompress the file labeled "data.tar.gz" by typing "tar zxvf data.tar.gz" at the command line, in the gismo/ directory. This will give you some sample data files to run GISMO on.
Now, edit the Makefile to reflect the location of your FLTK SGI lib/ and include/ directories. Build GISMO by typing "make" at the command prompt. You can do an optional 'make install' if you want to install the GISMO binary in /usr/local/bin.
% ./gismo < mapname >where < mapname > is a substring occuring in all of the file names which determine the thumbnail map. For example, "./gismo 92g" will get the user started with the Vancouver map. A window will then appear, displaying the thumbnail map. You are now ready to begin using GISMO.
The terrain map will appear in a new window. The dimensions of the map within this window will always be of a fixed size: so if you choose a really large subregion, GISMO will compress the map to fit in those dimensions; if you choose a really small subregion, GISMO will likewise expand the map. Thus, the smaller the subregion you choose, the more detailed the terrain map GISMO produces.
You may continue to select new subregions by tracing new boxes with the mouse on the thumbnail map; GISMO will open a new window for every subregion you select. If you decide to view a new region, you must quit GISMO (see Exiting GISMO) and specify a new region on the command line (see Getting Started).
Back to GISMO home.