2 What is the height above sea level at which an aircraft must fly in order...
2. What is the height above sea level at which an aircraft must fly in order to procure photography at an average scale of 1:12 000, if the average elevation of the area is 3000 m and the camera to be used has a focal length of 153 mm?
1. An exposure station is 1700 m above sea level. The elevation of Point A as seen in the photo is 200 m, and the elevation of Point B as seen in the photo is 720 m. The focal length of the camera is 153 mm. Determine the scale of the photo for the terrain lying at these two elevations.
Images a and b of ground points A and B appear on a vertical photograph taken froma flying height of 2625 m above datum. A 153.16-mm-focal-length camera was used. Points A and B have elevations of 407 m and 311 m above datum, respectively. Measured photo coordinates of the images are xa--60.2 mm, ya 47.3 mm, xb- 52.4 mm, yb 80.8 mm. Calculate the horizontal lengths of line AB. (a) If a third point C was measured with elevation of...