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題 名 | Accuracy Test and Method Choice for Map Digitization=成圖數化正確性檢核及數化方法之選擇 |
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作 者 | 林峰田; | 書刊名 | 中國工程學刊 |
卷 期 | 22:1 1999.01[民88.01] |
頁 次 | 頁79-86 |
分類號 | 440.9 |
關鍵詞 | 成圖數化; 資料正確度; 成本; 正確度分析; Map digitization; Data accuracy; Cost-accuracy analysis; |
語 文 | 英文(English) |
中文摘要 | 圖形資料數化成果的正確度評估乃是資料品質的重要一環。目前評估圖形資料正 確性的方法及標準可以分為統計方法及實務方法二大類。本文首先從理論上探討了此二種方 法之間的關係,並且進一步的提出了成本分析方法,以協助選擇適宜的數化方法。本文以淡 各和池上二個不同原圖品質的地區,利用三種不同的數化方法,共計進行了八次的實驗,以 比較統計方法及實務方法在檢核都市計畫分區圖數化成果的差異性,並獲得以下的結論:( 1 )實務的數化成果正確性評估項目應加入誤差平均值的檢核, ( 2 )即使原圖品質不佳 者, 其圖的誤差容許值可以由 0.5mm 提升到 0.3mm, ( 3 )原圖品質良好者, 採用 100dpi 之掃描解析度即可,( 4 )數化方法的選擇將隨著原圖品質、檢核標準、預算額度 而有所不同。 |
英文摘要 | The measurement of accuracy is one of the most important features of data quality. Many statistical and practical criteria have been set for paper map digitization under various situations and considerations. This article explores the theoretical relationship between statistical and practical accuracy tests, and proposes a framework of cost-accuracy analysis for choosing appropriate digitization methods. Eight trials using three digitization methods on two Taiwan zoning maps with different original qualities were performed to illustrate the differences between statistical and practical methods. The results showed that (1) the test for the mean of the errors should be included in the practical criteria, (2) the error tolerance standard for maps in poor condition can be raised from 0.5mm to 0.3mm, (3) it is sufficient to digitize maps in good condition using the lOOdpi-scree@ method, (4) appropriate digitization methods can be varied according to different map qualities, accuracy criteria, and budget. |
本系統中英文摘要資訊取自各篇刊載內容。