花蓮港廳自1909年成立至今已屆滿百年，在日治時期地圖的數位典藏研究中，除了地名與行政邊界資料庫的積極建置外，對自然環境與社會變遷研究相當重要的地形與土地利用資料，更是不可忽略的焦點。本研究以東台灣花蓮港廳的花蓮溪流域地區，不含番界地區共計28張台灣堡圖的花蓮溪流域為範圍，建立百年來完整的等高線地形數值資料庫，並針對土石流環境災害，納入具時間縱深的環境分析，與現代地圖的數值高程、集水區型態、河道變遷等環境因素進行分析比較，這個研究不但可以間接的反映出原本不易度量的環境穩定程度，更有助於在人文地理資訊系統的研究領域中，深度拓展地圖學的研究與應用。

Since its establishment in 1909, Hualien-gang Ting (Hualien Port) has had one hundred years of history. In the digital archives of maps during the Japanese Occupation Period, besides the construction of database for geographic names and administrative borders, much attention has also been paid to data on landform and land use, which are import to the studies of natural environment and social transformations. This study focuses on the Hualien River region in Hualien-gang Ting in eastern Taiwan, covering 28 fort maps of Hualien river region, not including the aboriginal area. It aims to construct the most complete contour landform numerical database in the recent one hundred years, conduct longitudinal environmental analysis on landslide disasters, and compare environmental factors on digital elevation, catchment types, and changes of river channels on the modern maps. This study can indirectly reflect the environmental stability that is difficult to measure, and expand the research and application of cartography in the research of humanity geographic information system.