Gb/T 20257. 1 000 、 1 : This part of gb/t 20257 specifies the grades, specifications and color standards of symbols and annotations for various natural and artificial features and geomorphic elements shown on.
Gb/t 20257的本部分规定了1∶500、1∶1 000、1∶2 000 地形图上表示的各种地物、地貌要素的符号、注记和图廓整饰，以及使用这些符号的方法和基本要求。 本部分适用于 1∶500、1∶1 000. This part of gb/t 20257 specifies the symbols, annotations and frame finishing of various features and plow elements represented on the 1:5 000.1:10 000 topographic map, as well as the.