soal
DESCRIPTION
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Soal
1. Berapa koordinat titik P pada gambar jika ditransformasikan ke system koordinat 3D (X,Y,Z)
jika ellipsoid yang dijadikan sebagai referensi yaitu WGS-84 ?
Jawab
Diketahui nilai :
a (m) : 6378137 m
b (m) : 6356752 m
1/f : 298
Lintang : 350 LS
Bujur : 1200 BB
h : 1500 m
Ditanyakan :
1. Koordinat titik P pada system koordinat kartesi 3D (X,Y,Z)
2. Jari –jari kelengkungan meridian (M)
3. Jari – jari kelengkungan vertical (N)
Penyelesaian
Mencari nilai e2 .
e2=(a2−b2 )a2
e2=(63781372−63567522)
63781372
e2=(2,27336×1011)4,06806×1013
e2=0,006694
Mencari nilai N
N= α
√(1−e2sin2φ)
![Page 2: Soal](https://reader036.vdokumen.com/reader036/viewer/2022082712/55cf8cf85503462b1390d8f7/html5/thumbnails/2.jpg)
N= 6378137
√(1−0,006694 sin235o)
N= 6378137
√0,997797584
N= 63781370,998898185
N=6385172,278
Mencari nilai koordinat X
X=(N+h ) cosφ cosλ
X=(6385172,278+1500 ) cos35ocos 120o
X=(6386672,278 )×0,819152044×(−0,5)
X=(N+h ) cosφ cosλ
X=−2615827,826
Mencari nilai koordinat Y
Y= (N+h ) cosφsin λ
Y= (6385172,278+1500 ) cos35o sin 120o
X=(6386672,278 )×0,819152044×(−0,866025404)
X=−4530746,699
Mencari nilai koordinat Z
Z=[N (1−e2 )+h ]sinφ
Z=[6385172,278 (1−0,006694 )+1500 ] sin 35o
Z=[6385172,278 (0,993305522 )+1500 ] sin 35o
Z=[ 6342426,882+1500 ] sin 35o
Z=[ 6343926,882 ] sin 35o
Z=[ 6343926,882 ] (−0,573576436)
Z=−3638726,973
Mencari nilai koordinat M
![Page 3: Soal](https://reader036.vdokumen.com/reader036/viewer/2022082712/55cf8cf85503462b1390d8f7/html5/thumbnails/3.jpg)