在地圖分析中將不同時期的地圖套疊，研究某現象的發展動態，是地圖學研究常用的方法之一。由於臺灣地區地圖在近半世紀來，製圖時採用的測繪基準，歷經幾次的更動，造成用圖者套圖分析時相當大的困擾。基此，本文將針對臺灣地區不同測繪基準的地形圖，進行尺度比、面積比及座標差之量算，進而分析因基準不同所造成的影響，並為解決套圖的方法提出具體方案。

Overlaying different versions of maps to investigate phenomenal dynamics of development in human society is one of the most frequently used methods in Cartography. Due to changes of geodetic datum for mapping in Taiwan area there caused enormous problems in nearly half of the last century when map users applied overlaying analysis. In this research we calculated scale factor, area factor, and coordinate differences to analyze the effects on overlaying analysis using different geodetic datum of topographic maps. We also proposed relevant methodology and actions to solve the problems.