所谓吸引范围或腹地,即交通线或站、港的服务地区,或称为以线、站、港为中心的经济区。具体地讲,某货流在一个时期内要经过一些线,在一些站、港装或卸,就说该货流的发生地与接收地在这一时期内是这些线、站、港的吸引范围。

The drawing region, or hinterland, is an area being attracted by transportation line, depot or port. Its theory and application are provided with immediate significance for transport techno-economic investigation and nodal economic regionalization in current Ghina ’s modernizations.Having referred to domestic and foreign documents, authors conclude a system of drawing regions with typology and hierarchy. The nature of a composite drawing region and its division into pure ones are fully expounded and paid attention to some ports’ hinterland in China. An outstanding achievement of this paper is using the symbol method of graph theory to delimit direct, coordinative and indirect drawing bounds.The authors design a table of correspondence between types of drawing region and kinds of freight volume. It can be used as the fundamental quantitative model for fre-ight forecast of transport points, lines and networks, thus provides planning work with economic basis for decision making.