| In order to quickly obtain the result of ecological suitability assessment for the agricultural administrative staff,provide the decision support for the agricultural structural adjustment,the study carried out the suitability assessment on the general crops,characteristic agricultural products and possibly introduced new type crops as well.Meanwhile,the suitability grades were classified and WebGIS information system was established.Combined with the data characteristics,the study took the current implantation conditions as the most suitable condition to extract the value of the ecological factors.And then each factor was seen in the equal status,ignoring their influencing effect.The clustering analysis was used to do the ecological suitability assessment of the crops.Before it,the data was processed by dimensionless method and was analyzed by Euclidean distance to get the sub-value of each estimation unit.According to the experience of the agricultural experts and the current implantation conditions,the suitability grades were classified and the threshold was determined.In this study,74 types of crops were made the suitability assessment and graded.After the analysis of the materials and data concerning the crop suitability assessment,the object-oriented technique was used to establish the spatial planting resources database.The tri-level structure based on WebGIS was designed with the functions including the display,statistics,information editing and renewal,as well as the suitability evaluation.On the basis of the business model and system design,the decision support system concerning the crop ecological suitability was developed.The system has improved the heavy workload and low spatial precision in the conventional evaluation by GIS.In addition,the system has provided the agricultural administrative staff with the direct and quick support,stimulating the agricultural structural adjustment to improve the productive benefits.
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