Knowledge Acquisition Interface
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Basic Knowledge
Medium Knowledge
Advanced Knowledge
Acquisition Acquisition Acquisition
A M D A A M D A A M D A
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Basic Knowledge Base| |Medium Knowledge Base| |Advanced Knowledge Base
Fig. 5 The structure of GKBMS
base on the data in the database and gains
the conclusion. This means that the inference
is a strategy program composed of inference-
control algorithms and knowledge-search
algorithms.
By the use of the rules in the geographical
knowledge base, the inference engine in the
MCGES can match, calculate the data in the
MCGIS (Global Data Base) to gain solution on
the geographical problems with unknown model.
This module can also provide reverse real-
time explanation for the processes and
results.
MCGES adopts product ion-strategy in
reasonning.
In accordance with the three-level in
knowledge, a complete inference procedure is
composed of operations in three levels.
(1) Basic inference
Use the knowledge in the first level to match
values of factors, and grade the factors;
(2) Medium inference
Based on the conclusion of the basic
inference and the medium knowledge (rules) to
classify the integrated geographical factor;
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3. THE APPLICATION AND EVALUATION OF MCGES
MCGES is successfully used to solve many
problems of soil and water conservation
planning in Kouhe,a district in Liuhe valley,
Inner Mongolia Aotonomy Region.
Useing following data and knowledge:
(1) topographical map of Kouhe, 1:100,000,
(2) geo-code Model map of Kouhe, 1:100,000,
(3) GCM rank table of Kouhe,
(4) erosion type classification rules,
(5) a new Erosion intensity model,
(6) soil and water conservation experience
measures,
MCGES can gain following results:
(1) single factor output: value and map of
slope, aspect, average slope, soil type,
soil depth, gully density, vegetation
coverage etc.
(2) integrated factor output: value and map
of erosion intensity, suggests and maps
of soil and water conservation
measurement etc.
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