一種高效的海量遙感柵格數(shù)據(jù)庫的空間可視化檢索算法
An Efficient Spatial Visual Retrieval Algorithm on Magnanimous Remote Sensing Raster Image Data Base
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摘要: 該文針對利用GIS現(xiàn)有空間查詢接口進行海量遙感柵格數(shù)據(jù)庫空間可視化檢索效率低下的問題。在深入研究海量遙感柵格數(shù)據(jù)庫的空間可視化檢索特點的基礎(chǔ)上，提出了一種直接針對關(guān)系數(shù)據(jù)庫(RDBMS)存儲過程的高效的海量遙感柵格數(shù)據(jù)庫復(fù)雜空間可視化檢索算法，并對算法進行了多個級別的性能優(yōu)化。該算法可直接應(yīng)用于海量遙感柵格數(shù)據(jù)庫基于多邊形、橢圓和線穿越等復(fù)雜空間可視化查詢的應(yīng)用環(huán)境。實驗結(jié)果說明該算法具有穩(wěn)定性和普適性。
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關(guān)鍵詞:
- 可視化檢索;空間查詢;查詢優(yōu)化;存儲過程
Abstract: It is inefficient to visually retrieve image on magnanimous remote sensing raster image data base by some GIS spatial query interface. An efficient spatial visual retrieval algorithm aimed at directly storage procedure of Relational Data Base Management System (RDBMS) is described and optimized on performance on many levels in this paper after the character of magnanimous remote sensing raster image database spatial visual retrieval is studied in depth. This algorithm is implemented in a real application environment of magnanimous remote sensing raster image data base based on the spatial polygon query, ellipse query and line through query. The results of experiment demonstrate that this algorithm is stable and adaptable. -
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