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Title: Eagle terrain preprocessor
Authors: McKinley, George B.
Falls, T. C.
Stuart, David C.
Keywords: Line of sight
Thinning algorithms
Mobility corridors
Voronoi diagrams
Military topography
Publisher: Geotechnical Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: ERDC/GL TR ; 00-10.
Description: Technical Report
Abstract: The purpose of this report is to describe the automated user-friendly programs produced by the U.S. Army Engineer Research and Development Center, Vicksburg, MS, which create the terrain-related inputs required by the Eagle model. The project was divided into three tasks. The first task involved modification of the mobility corridors (MC) network creation software in Terrain Evaluation Module (TEM) to compute the additional attributes required by the Eagle model and also to output the network in the format required by Eagle. Also, three methodologies are examined to discover the approach that will create the most complete MC network. The second task was to produce software to create the Eagle terrain tiles and output them in the proper format. Task three required the creation of software to generate a graphics image in X-Windows dump format for use as a background image by Eagle. These programs are described in terms of their input, methodology, and output. Based on the results of this investigation, the following conclusions are drawn: (A.) The modified classical thinning algorithm was the best suited of the three algorithms tested for the application of automatic MD generation. (B.) The software to generate an Eagle terrain data set now resides on TEM, which is an element of the Army Common Hardware/Software Program and is already operational at the Center for Army Analysis. (C.) The parameters for this software are modifiable by input to forms, which is far superior to the previous software that often required code modifications whenever a new area was selected for use in Eagle. (D.) Although no direct comparisons to the previous software are possible, it is evident from testing that the TEM implementation is much faster. (E.) The patch expansion algorithm produced good results when applied to the generation of Voronoi diagrams. Based on the information presented in this study, it is recommended to: (1.) Accept the software presented in this report as a preprocessor for the Eagle model. (2.) Investigate the potential of this Eagle preprocessor as a starting point in the development of a scalable terrain generation system to support potential future Eagle/theater simulation and support a possibly scalable JWARS model in the future.
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