castor800617 寫:(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
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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
發表於 : 2016 5月 24 (週二) 9:09 pm