feature operation type 中文意思是什麼
feature operation type
解釋
特徵操作類型 地物操作型-
As far as model is concerned, the forth generation software should be characterized with spatial entity - oriented. the paper established the geographic spatial model based on the thinking of object - oriented ; studied the structure of the model " s elementary unit - - geographic entity ; brought forward the concept of geometric data type which characterize entity ' s spatial feature in the structure ; defined five kinds of geometric data types such as point, arc, area, composite arc, composite area ; and formalized their collective operation using hypergraph. at the end of this paper writer studied preliminarily the method of entity query and analysis based on the model
本論文從面向對象的基本思想出發,建立了面向對象的地理空間模型;研究了地理空間模型中的基本單位? ?地理實體的結構,針對實體結構中用來表徵實體空間特性的組成部分? ?幾何對象,提出了其取值范圍,即幾何數據類型的概念;對點、弧、面、復合弧和組合面五種幾何數據類型進行了定義;並使用超圖工具對幾何數據類型的集合操作進行了形式化描述;對基於面向對象的地理空間模型的實體查詢和分析方法也做了初步研究。
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