ISTA Image station
Columns | format | contents/explanation | |
|---|---|---|---|
1-4 | A4 | ISTA | |
5-20 | A16 | Station name | |
21-36 | A16 | Image name | |
37-50 | F14.0 | Height of instrument i | |
51-60 | F10.0 | Φ | Measured photo orientation angles Φ, Ω, Κ |
This input statement allows centring of a photo on an image station and/or the introduction of measured orientation angles Φ, Ω, Κ for a photo on an image station.
Centring is performed when an image station name has been entered and positive values have been defined for the centring accuracy by the ISES statement. The camera corresponding to the photo will then automatically obtain an eccentricity vector e' as unknown. If the Z-value is also included in the centring process (szST > 0.0) then the height of instrument must be considered in the adjustment as a correction term and therefore must be entered.
Measured orientation angles of the photo are considered in case of defining values larger than zero for the respective standard deviations in the ISES statement. Then the calibration angles dφ, dω, dκ are automatically assigned to the respective camera as unknowns.
If possible, the vector e' as well as the calibration angles dφ, dω, dκ should be introduced to the adjustment as observed unknowns (see ECCA and ECES statements).
Some restrictions on centring and orientation on a photo-station exist; they were explained in Section 2.1.2.