Gu Pei, Bu Jueying
The Chinese glacier inventory is part of the international glacier inventory, and glacier maps are important components of the glacier inventory.Since 1979, we have compiled the glacier maps for the Qilian Mountains, Altai Mountains, Tianshan Mountains and Pamier Mountains successively, about 40% of all the glacier maps of the country.In order to improve the quality and accuracy of the maps, we have considered the following in accordance with the principles for the compilation of the international glacier inventory and the specific conditions in China:1. Materials and dataThe latest l:50000 and 1:100000 aerial topographic maps are used as the basis of glacier maps, and the aerial photographs as the supplementary data for improvement.2. ScaleAccording to the uses of glacial maps, the shape and size of surveyed areas and the basic data, the scales of drainage basin maps are fixed at l:250000 and l:400000. For the distribution maps of the general glacier distribution, glacial geographic landscape and distribution characteristics, and for coding key maps, scales are 1:1000000 and l:2000003. Synthesis and representationShowing location, type and shape of glaciers, as well as their dependent relationship with drainage systems is the most important task for the compilation of glacier inventory. Therefore, it is very necessary to carry out scientific generalization proper deletion and addition of data. In addition, the key elements of drainage basins, ridges.etc. should be presented in detail.The glacier is indicated in its plane figure. In addition, for reflecting the glacial distribution characteristics and distribution law, the ridge, elevation on horn and terminal of glacier tongue etc. as wall as the inhabited place and the road should be correspondingly presented.