随着我国社会主义建设事业的迅速发展,对地图的要求越来越高,尤其对专题地图和地图集的需要更为突出。目前省(区)地图集、经济图集以及农业,水文、气候、肿瘤、地质、历史等各种专题图集已相继出版。在这种形势推动下,为 With the rapid development of China’s socialist construction, the demand for maps is getting higher and higher, especially for thematic maps and atlases. At present, atlas (district) atlas, economic atlases and various atlas of agriculture, hydrology, climate, cancer, geology and history have been published in succession. In this situation, driven by