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Design and Development of the Expert System for Forest Lands’ Classification and Evaluation

Author: YangWenJun
Tutor: ZengSiQi
School: Central South University of Forestry Science and Technology
Course: Forest Management
Keywords: Expert system Woodland Classification and Gradation Appraisal ArcEngine VB.Net
CLC: S724
Type: Master's thesis
Year: 2010
Downloads: 44
Quote: 0
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Abstract


In recent years, the expert system with its unique advantages is widely used in all areas of society. Wealth of expert knowledge in the knowledge base of expert system, combined with the inference engine, and explain the reasoning ability to simulate the decision-making process of a human expert to solve the complex problems in the related field. Since the collective forest right system reform, the the forestland transfer growing workload developers woodland grading system of grading and valuation experts to facilitate assistance to forest land classification and assessment of assets or alternative forestry experts to a certain extent. Hunan Province, Changsha, Zhuzhou and woodland, Changsha County Xingsha forest, for example, the expert system's knowledge and the theory is applied to the forest resource classification and evaluation work. The woodland site quality factor (topography, soil type, soil thickness, the thickness of the humus layer, the height of the sea technology, aspect, slope position, slope) and ecological economy quality factor (community structure, surface coverage, species diversity operating level, skidding conditions, human disturbance degree, the supply of potential transport distance) as the main parameters, woodland grade division; valuation range can be set, choose the valuation method, scientific and reasonable valuation. In order to improve the usefulness of the expert system, the system to achieve a separation of forest land classification and valuation expert system knowledge base and the inference engine. Users can flexibly define expert system inference engine, namely: the woodland, the user can customize the rules of inference, the valuation method used to select the most suitable woodland forest resource classification, gradation and valuation. ESRI's Arcgis Engine Components ActiveX component development technology, expert system classification the grading results ArcEngine graphics library mount; same time, the system layer elements editing, spatial analysis and management functions with the flexibility to add roads, rivers, woodlands and other geographic features, the development of the measurement function of distance, length, area, greatly expanding the flexibility of spatial data management, enhanced visualization of classification and valuation results rich query capabilities, the forest land classification valuation results, simple and practical. The system through the collection and collation of expert knowledge, the establishment of forest land classification and grading formula library (Formula.dll), part of the expert knowledge to provide for other related systems, simplifying the development work. The system in addition to the completion of the forest land classification and grading and valuation functions to achieve the project inquiries, project statistics, regional updates, data updates, rules modifications, accumulation calculated, the database modify and results reporting and other functions, and enhance the system's utility.

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CLC: > Agricultural Sciences > Forestry > Silviculture, tree breeding and afforestation techniques > Suitable for afforestation to
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