Economic Aspects of Forest Management on Public Lands

GIS for MAGIS information and Downloads

GIS Data for MAGIS models

Data for MAGIS modeling can be either ArcInfo coverages or shapefiles. They consist of at least one polygon coverage (as treatment units), and one line coverage (the road network.)  The polygon coverage is to be attributed with basic vegetation data and with optional 'zones' for management decision-making. The road network coverage consists of links defined by from- and to-nodes, and includes both existing links and proposed links. Polygons and links are 'connected' by a 'loading point' table, which consists of a polygon identifier, a node identifier, a logging system name and the percent of the total output from the polygon which is loaded to the node. Additional data in the form of associated tables can include the road options/and costs by link, and traffic costs by link and road option.

     Once the GIS data are imported into MAGIS, they are used to determine adjacency, setup scenarios, and display solutions. For example, the screen displayed below allows the MAGIS user to select treatments to 'set' into solution (while MAGIS selects any remaining treatments based on the scenario setup parameters.) These map displays are made using ArcMap technology.