# Forum

### Author Topic: Oblique Flight Tie Point Problem  (Read 890 times)

#### mescioglu

• Newbie
• Posts: 2
##### Oblique Flight Tie Point Problem
« on: March 28, 2024, 08:55:59 AM »
Hi,
I have different oblique flights. Some of them flew from east to west (a) and some of them flew from northwest to southeast (b). The problem is I can collect tie points and adjust a type flights but b types cant collect any point. Is there any way to make sure my EO? Here is sample EO from different flights.

CAMERA PARAMETERS

# Camera;      Rot_X;       Rot_Y;       Rot_Z;
0;    0.00000;    -0.00000;     0.00000;
1;    0.00000;    -0.00000;     0.00000;
2;    0.01188;    45.02376;     0.03366;
3;   -0.02070;   -44.95446;    -0.01683;
4;   45.00279;     0.03006;     0.02736;
5;  -45.01152;     0.07623;    -0.03285;

A type Flight Sample EO
# Camera;    Nr;     Rot_X;       Rot_Y;       Rot_Z;
1;  0025;   0.06855;    -0.56731;   -90.07902;
2;  0025; -44.95508;    -0.44281;   -90.15921;
3;  0025;  45.02295;    -0.65020;   -90.08802;
4;  0025;   0.09363;    44.43553;   -90.02675;
5;  0025;  -0.06042;   -45.57871;   -90.08112;

B type Flight Sample EO
# Camera;    Nr;     Rot_X;       Rot_Y;       Rot_Z;
1;  0058;    -0.51279;    -0.30346;  -151.12154;
2;  0058;   -20.33209;    41.06355;  -159.08256;
3;  0058;    19.56273;   -41.34521;  -158.29459;
4;  0058;    37.78951;    25.31395;  -142.33963;
5;  0058;   -38.75922;   -26.21549;  -141.76461;
« Last Edit: March 28, 2024, 02:16:27 PM by mescioglu »

#### Paulo

• Hero Member
• Posts: 1352
##### Re: Oblique Flight Tie Point Problem
« Reply #1 on: March 28, 2024, 05:34:49 PM »
Hi mescioglu,

I think your 2nd (B NE-NW) EO angle values are wrong compared to A flight EW. As you can see in attachment, I placed 10 images. Five with A sample EO and 5 with B sample EO. Sample A are correct as seen in 90 degrees angles in projection lines from cc to principal point (black lines) while B lines are not 90...

The second image from sample b should have angles around (-45, 0,- 151) and not (-20.33209, 41.06355, -159.08256)
« Last Edit: March 28, 2024, 05:41:30 PM by Paulo »
Best Regards,
Paul Pelletier,
Surveyor

#### mescioglu

• Newbie
• Posts: 2
##### Re: Oblique Flight Tie Point Problem
« Reply #2 on: March 29, 2024, 02:24:22 PM »
Hi Paulo
Thank you for your help. I realise stiation better now.
Regards.

Hi mescioglu,

I think your 2nd (B NE-NW) EO angle values are wrong compared to A flight EW. As you can see in attachment, I placed 10 images. Five with A sample EO and 5 with B sample EO. Sample A are correct as seen in 90 degrees angles in projection lines from cc to principal point (black lines) while B lines are not 90...

The second image from sample b should have angles around (-45, 0,- 151) and not (-20.33209, 41.06355, -159.08256)
« Last Edit: March 29, 2024, 03:19:25 PM by mescioglu »