Development of information system for investigation and evaluation of economic situation of regional agriculture based on WebGIS and models

In order to dynamically and accurately obtain the information of input structure, output level, and economic benefits of regional agriculture production, based on the spatial-temporal database and the open source map server of SharpMap, the WebGIS-based information system for investigation and evaluation of economic situation of regional agriculture (SHAEWS) was developed with ASP.NET(C#). The construction of SHAEWS was divided into two parts: agricultural input-output database and model system. The database was composed of sample monitoring data, relief map data and metadata. The model system covered crop data analysis and aggregation model, crop stubbles extraction and analysis model, Cobb-Douglas production model, and comprehensive evaluation model, etc. SHAEWS included nine functional subsystems named as sample data acquisition, sample data examination, crops evaluation, crop stubble evaluation, crops input-output simulation with Cobb-Douglas production function, time series analysis, spatial analysis, data report, and metadata browsing, respectively. The results show that SHAEWS can combine sample monitoring data with map data and through relevant model calculations, can achieve the on-line sharing, analysis, evaluation and consultant service of agricultural input-output information.