Abstract
The focus of our work in forest preservation is to protect Taiwan's forests from man-made catastrophes. Such include illegal cultivation, woodlands invasion, induced forest fires, and so on-affecting ecological balances and public safety. This study proposes a forest preservation management system that applies new technologies such as remote sensing, the geographic information system, and the global positioning system with central computer control. This management system can be applies to pre-forest damage monitoring work to obtain estimates of practicability. Bundling RS, GIS, and GPS into this system also adds the potential of tracking and aiding victims of forest disasters. Finally, the system is also designed to help operators better understand the ocmpositon of an existing forest and to provide decision-makers with reliable data for analysis and reference. With such data, a forest supervisor should be better equipped to make quick decisions and prevent a forest fire from spreading and causing greater loss.

1. Preface
The Geographic Information System (GIS) as established for Taiwan's forests incorporates an information database and system analysis functions. The system permits research of data related to forest area distribution and allows forestry management personnel timely access to data on conditions of forests under their supervision. GIS technology not only permits data, such as maps charting soil conditions, topography, elevation, and vegetation, to be entered and displayed in digital format, influencing factor data can be entered as well. Therefore, apart from the benefits of combining quantifiable data within an interactive, web-based format, the GIS technology adds to the equation the ability to overlay such data atop satellite imagery. Thus, users can even more rapidly update their data and thus more effectively monitor changes in the natural environment.

The comprehensive Forestry Protection Management System was established primarily to protect Taiwan's forests from man-induced hazards. Not only have the intrusions of man through unauthorized clearing; woodlands invasion, and induced forest fires caused irreparable damage to the ecology, they have also endangered the welfare of the nation. An effective data collection and application environment was established in order to help integrate current forestry-use charts with relevant data This new system will make data collection, updating, referencing, and analysis much easier as well as maintain strong momentum behind relevant forestry management work implementation. This research proposes a management system for forestry preservation which weds computer analysis functions with remote (RS) and global positioning system (GIS) technologies to form a powerful tool for forest disaster monitoring and control. The system also provides a regular analysis of data collected to supervisory personnel for their reference and action.

II. Research Materials and Methodology

1. Description of the Area Research
The Ta Chia Stream Commercial Zone is located in central Taiwan. Administratively, the zone straddles Hoping Hsiang in Taichung County, Jen Ai Hsiang in Nantou Country, and Tatung Hsiang in I-Lan Country. Geographically, the zone is located between 121o 07'50" and 121o26'42"east longitude and between 24o08'16" and 24o26'36" north latitude. The Nanhu North Mountain to the Nanhu South Mountain forma the eastern boarder through to the central mountain peaks to the eastern face of Hohuan Mountain. The southern extremity of the zone runs from Hohuan Mountain meets the Chushui Stream Commercial zone and then the Pahsien Commercial zone until reaching the The Chi Reservoir. The west is bounded first by the Tamu Mountain, followed by the Hsing Lung Mountain until reaching the main peak of Hsueh Mountain. The north follows the Ta His stream to the Taiping Mountain commercial zone until reaching Nanhu Mountain.

This Commercial zone is located above both the Ta Chia and Peikang streams and is bordered on theeat by the Wuhsi Commercial zone. This zone is met on the south by both the Chushui Stream and Puli Commercial zone. The western border touches on Pahsien Mountain and the Ta'an His Commercial zone. The north border runs along the Ta His Stream and is adjacent to the Taiping Mountain Commercial Zome. Commercial zone area particulars are listed below.

Sections: Forest divided into sections 1 through 85
Area: 48,754.39 hectares
Reserve Land: 12,124,878 square meters