Preparation of footprints
For linking the footrpints with the oblique aerial images in WebOffice 10.9 R4 it is essential that an attribute is provided in the service which contains the essential information in connected form. This is the following information:
•Image_Number
This is the unique number of the oblique aerial images.
•Flight_Direction
The flight direction indicates the direction in which the aircraft flew when the image was taken. The values must be in the following form: "N, S, W, O"
•Camera_Orientation
Camera orientation refers to the relative orientation of the camera to the aircraft during shooting.
The values used here are crucial for the correct naming of the image files and the directory structure. For more information, please refer to the chapter Preparation of Images. |
•Strip
This is the strip number of the oblique aerial images.
•Direction_of_View
The direction of view is the compass direction in which the camera was aligned when the oblique aerial images were taken. The values must be in the following form: Nord, Süd, West, Ost"
•LAT
The field represents the Y-coordinate of the centroids of the footrpints and can be calculated with the function Calculate Geometry in ArcMap:
Calculation "LAT" in Field Calculator
For Property select Y Coordinate of Centroid and for Units the unit Decimal Degrees":
Calculation "LAT" in Field Calculator
•LON
The field represents the X-coordinate of the centroids of the footrpints and is calculated analogous to LAT. Here, X Coordinate of Centroid must be selected in the Field Calculator under Property.
If all these fields are present in the data in the correct form, the Field Calculator can be used to calculate the attribute Bildinfo, which is the key field for the entire application. Provided that the fields are named as in this manual, the following command can be executed to calculate the attribute Bildinfo in the Field Calculator:
[Image_Number] &"_"& [Flight_Direction] &"_"& [Camera_Orientation] &"_"& [Strip] &"_"& [Direction_of_View] &"_"& [LAT] &"_"& [LON]
If other field names were used, the command must be adapted accordingly:
Calculation the field "Bildinfo" in ArcMap using Field Calculator