Activex control imports the contents of the database package through the techniques of com interface and draws the graphics . the graphics can save as autocad files , and can read data from the autocad files 系統(tǒng)執(zhí)行的第一步是由oledb技術(shù)形成一個(gè)數(shù)據(jù)包存放于數(shù)據(jù)組件中,然后, activex控件通過組件接口技術(shù)導(dǎo)入數(shù)據(jù)組件里面的內(nèi)容并畫出圖形。
After inputting essential geographic information to the tables of sql by the geological men , the ole db form a database package and the atl component assort the contents in the database package to data objects automatically 系統(tǒng)架構(gòu)主要借鑒了統(tǒng)一建模語言u(píng)ml 、軟件能力成熟度模型cmm 。本系統(tǒng)只要輸入了必要的地質(zhì)信息到sql表中,就能自動(dòng)繪制圖形。