頁籤選單縮合
題 名 | 臺灣網格化高程評估之研究=A Study on the Rasterization of Taiwan Island Based on the Elevation Evaluation |
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作 者 | 邱祈榮; | 書刊名 | 中華林學季刊 |
卷 期 | 30:1=116 1997.03[民86.03] |
頁 次 | 頁85-91 |
分類號 | 440.98 |
關鍵詞 | 數值地形; 網格大小; 累積分佈; Digital terrain model; DTM; Grid size; Cumulative distribution; |
語 文 | 中文(Chinese) |
中文摘要 | 地理資訊系統的資料結構可分為向量式與網格式兩大類,其各有優缺點。然而當考慮與其他資料或模式相互整合時,網格式資料結構較常被採用。於使用網格式資料時,首要的工作即在於決定網格大小。本研究之目的即在於發展適當的評估方法,做為臺灣全島網格化之參考。在評估過程中,以全島數值地形資料為主要之依據,從高程代表性、網格平滑效應及網格數目等三方面加以評估。其結果顯示,以全島為尺度的網格大小以2公里以下為宜,若考慮高山區域,則以1公里以下網格為佳。經由結果證實,本研究所發展之評估方法,確實具有實用性,可為日後選擇網格大小時之參考。 |
英文摘要 | There are two kinds of data models in GIS: the vector model and the raster model. When we consider integrating GIS with the remote sensing data, DTM, the raster model is better than the vector model. One of the improtant things in rasterization is to decide the size of raster grid. Until now in Taiwan, the decision process of the grid size has not yet been evaluated. There fore, the purpose of this study was to develop an approach to evaluate the proper grid size for the asterization of Taiwan island. In the evaluation process, the 40m*40m DTM data was used as the base of evaluation. The representativeness of elevaton, the smoothing effect of rasterization, and the number of grids were the factors used to decide the proper grid size. The results of this study showed that the size of grid under 2 kilometers could be used for the rasterization of Taiwan island. If consideration of high mountainous areas was included, then, the size of the grid should be under 1 kilmoeter. |
本系統中英文摘要資訊取自各篇刊載內容。