This article introduces the development of international and national spatial data infrastructure ( sdi ) , analyses the situation both at present and in the future and points out construction mission of sichuan provincial sdi 本文介紹了國(guó)際國(guó)內(nèi)空間數(shù)據(jù)基礎(chǔ)設(shè)施的發(fā)展,分析了四川省空間數(shù)據(jù)基礎(chǔ)設(shè)施的現(xiàn)狀和面臨的形勢(shì),指出了四川省空間數(shù)據(jù)基礎(chǔ)設(shè)施建設(shè)的任務(wù)。
As one of frame data of national spatial data infrastructure , digital elevation model excels contour line . it can express continuous gurgitation of ground , and it can also carry out relevant mathematical analyses and imitation , so it is applied broadly in various fields at present <中文摘要> =數(shù)字高程模型dem是國(guó)家空間數(shù)據(jù)基礎(chǔ)設(shè)施的框架數(shù)據(jù)之一,其彌補(bǔ)了等高線的不足,既能表示地面的連續(xù)起伏變化,又適合作相應(yīng)的數(shù)學(xué)分析和模擬,現(xiàn)在已在各個(gè)領(lǐng)域得到了廣泛的應(yīng)用。