A.測角網(wǎng) B.導(dǎo)線網(wǎng) C.GPS網(wǎng) D.大地測量法
A.L0=6°n+3° B.L0=3°n-3° C.L0=3°n-1.5° D.L0=3°n
A.1:500 B.1:2000 C.1:2萬 D.1:5000