目前,情报检索主要分为文献检索和数据检索,其结果是整篇文献的内、外部特征或结果是数据的检索。我们在这里把图形的检索独立于前两类检索而着重地提出来,是因为:一、图形检索有其独有的特点。图形检索的结果不是图形文献的内、外部特征的文字描述,这一点有别于文献检索中的地图或其它图件检索;其结果也不是图形转换成的数据,这一点有别于数据检索。图形检索的结果是图形本身。图形检索的需求早已有之,在地学、农业、林业、交通业、气象预报系统和国民经济等部门,这种需求尤为迫切。但由于技术条件不成熟,直至前些年,人们还只能通过 At present, information retrieval is mainly divided into document retrieval and data retrieval. As a result, the internal or external features or results of the entire document are data retrieval. We are here to graph retrieval independent of the first two types of retrieval and put it down, because: First, the graphics retrieval has its own unique characteristics. The result of graphic retrieval is not the textual description of the internal and external features of graphic documents, which is different from the retrieval of maps or other graphic documents in document retrieval; the result is not the data converted from graphic, which is different from the data retrieval. The result of a graph search is the graph itself. The demand for graphic retrieval has already existed. Such needs are especially urgent in geosciences, agriculture, forestry, transportation, weather forecasting systems and the national economy. However, due to the immature technical conditions, until a few years ago, people still only passed