一、引言表示地貌之方法不下十余种,但以等高线法应用最广。若地图缩尺大於十万分之一,表示之效果,诚无出其右者。惟地图辅尺较小时,则等高线并非最适宜之方法。因缩尺较小之地图,等高线间距必大,局部之地貌改变,常被抹杀。即平原与同山地等最重要之自然地理区划,亦竟不能明显表示。例如我国东南沿海、原多起伏之邱陵,而太原、长安及成都附近,实为广大之平原。

The importance of relative relief as a geographic factor is gradually being realized, but its significance in relation to both physiography and human activi-ties has hardly been appreciated. The present paper tries to elucidate relative relief in its manifold relations, using Tsunyi District of Kweichow Province as an example. With the 1/50,OOOth new Ordnance maps as the base, the writer has prepa- red a relative relief map for the region which stretches 92 km. from north to south and 73 km. from east to west, covering an area of 6,700 sq. km. The base maps are divided into small squares each measuring 2 x 2cm., with an area of about 1 sq.km. and the difference of height between the highest and lowest points in each square is noted.