It realized the spatial interpolation software grounded on geostatistics seamlesslly integrated with the system using the way of oop and the technology of ole / activex based on com . using vector - grid spatial - overlap analysis to solve the limitation of the grid and general vector data structure in the course of creating prescription , it made fertilizer prescription founded on the main factor of soil nutrient and yield - target . also it effectively integrated comgis with exper t system using the technique of loose coupling 以面向?qū)ο蟮脑O(shè)計方法為基礎(chǔ),利用“組件對象模型”基礎(chǔ)上ole / activex技術(shù)實(shí)現(xiàn)基于地統(tǒng)計學(xué)的空間插值軟件實(shí)現(xiàn)及與施肥處方系統(tǒng)的無縫集成;應(yīng)用基于矢量網(wǎng)格的空間疊加分析方法解決柵格和常規(guī)矢量數(shù)據(jù)結(jié)構(gòu)在處方生成中的局限,生成了基于土壤養(yǎng)分和目標(biāo)產(chǎn)量為主要因素的施肥處方;利用松散耦合技術(shù)將comgis與施肥專家系統(tǒng)進(jìn)行有效集成;充分考慮施肥機(jī)對施肥處方數(shù)據(jù)結(jié)構(gòu)要求,在wgs - 84坐標(biāo)系下采用具有柵格單元的矢量施肥處方。