地籍測量乙級 坐標比例尺

[castor800617]

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(2)下列哪一組坐標(N,E)是比例尺為1/1000之某一圖幅之圖廓坐標?
1)(2562400,167000) 2)(2562600,167200) 3)(22562800,167400) 4)(2563200,167600)

求解

[webuser]

(2)下列哪一組坐標(N,E)是比例尺為1/1000之某一圖幅之圖廓坐標?
1)(2562400,167000) 2)(2562600,167200) 3)(22562800,167400) 4)(2563200,167600)

請問如何判斷? 還有各比例尺

x = (2400+2600+2800+3200)/4 = 2750

y = (7000+7200+7400+7600)/4 = 7300

vx1 = 2750-2400 = 350
vx2 = 2750-2600 = 150
vx3 = 2750-2800 = -50
vx4 = 2750-3200 = -450

mx = (+-)[350^2+150^2+(-50)^2+(-450)^2]^(1/2) = (+-)591.61

vy1 = 7300-7000 = 300
vy2 = 7300-7200 = 100
vy3 = 7300-7400 = -100
vy4 = 7300-7600 = -300

my = (+-)[300^2+100^2+(-100)^2+(-300)^2]^(1/2) = (+-)447.21
---------------------------------------------------------------------------------

1/1000 = 0.001

Sx1 = 591.61/2562400 = 0.00023
Sx2 = 591.61/2562600 = 0.00023
Sx3 = 591.61/2562800 = 0.00023
Sx4 = 591.61/2563200 = 0.00023

Sy1 = 447.21/167000 = 0.00268
Sy2 = 447.21/167200 = 0.00267
Sy3 = 447.21/167400 = 0.00267
Sy4 = 447.21/167600 = 0.00267

座標比例尺
S1 = [0.00023^2+0.00267]^(1/2) = 0.00269
S2 = [0.00023^2+0.00267]^(1/2) = 0.00268
S3 = [0.00023^2+0.00267]^(1/2) = 0.00268
S4 = [0.00023^2+0.00267]^(1/2) = 0.00268

圖幅的座標基準
(1) (2562400,167000)為(x,y)【原點】做間隔性誤差位移

[castor800617]

不太懂耶

[webuser]

哪裡不懂？

[castor800617]

x = (2400+2600+2800+3200)/4 = 2750

y = (7000+7200+7400+7600)/4 = 7300

位何要求這個? 裡頭數字哪裡來呢

[webuser]

(1)最或是值
(2)觀測值的偏差值

[castor800617]

那從哪邊看答案為2呢?

[webuser]

那從哪邊看答案為2呢?

講真的，這題還真的沒有標準答案。

[Leben]

題目來源?

[castor800617]

乙級地籍測量題庫

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