Preliminary planning of forest roads using ARC GRID Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/7p88cn31c

Graduation date: 1996

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  • Forest road planning is importaht in logging operations, because it can affect feasibility and cost of forest operations. Due to rapid advances in computer hardware, GIS software, and remote sensing techniques, computer forest road planning models using GIS are becoming practical. DEM data at 30 meter resolution are common and 10 meter resolution exists. Eventually 10 meter resolution will be common and and perhaps 5 meter or better resolution will be available. The objective of this paper is to explore the usefulness of existing "offthe- shelf' GIS software in preliminary forest road planning. I chose ARC/INFO a widely used GlS in the United States by public and private forest managers. I tried two approaches to forest road location. In the first approach I used the available PATHDISTANCE and COSTPATH functions within ARC GRID. In the 1 second approach I developed a supplementary "C" program to calculate earthwork costs for each cell to improve the cost estimates in the shortest path calculation. The earthwork costs included considerations of excavation quantities and type of soil. I compared the results for the two approaches on a 1657 acre section of the H.J. Andrews Experimental Forest. I found the second approach that included calculation of the earthwork costs to give superior results. The test results suggest that preliminary planning of roads using GIS coupled with supplementary programs may be useful for preliminary road planning, particularly as higher resolution data becomes available. Additional research needs to be done on refining horizontal and vertical geometry considerations within the GRID GIS structure in order to evaluate vehicle performance and to improve estimates of construction quantities.
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