Fixed points
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Position and height fix points are hierarchically divided into those of the state survey (LFP1, LFP2, HFP1 and HFP2) and the official survey (LFP3, HFP3).
位置与高程固定点按层级划分为两类:其一为国家测量(state survey)固定点,包含LFP1、LFP2、HFP1及HFP2;其二为官方测量(official survey)固定点,包含LFP3及HFP3。
创建时间:
2024-09-05



