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1.1 Basic idea and main task of photogrammetry If you want to measure the size of an object, let s say the length, width and height of a house, then normally you will carry this out directly at the object. Now imagine that the house didn t exist anymore it was destroyed, but some historic photos exist. Then, if you can determine the scale of the photos, it must be pos- ble to get the desired data. Of course you can use photos to get information about objects. This kind of - formation is different: So, for example, you may receive qualitative data (the house seems to be old, the walls are...

1.1 Basic idea and main task of photogrammetry If you want to measure the size of an object, let s say the length, width and height of a house, then normally you will carry this out directly at the object. Now imagine that the house didn t exist anymore it was destroyed, but some historic photos exist. Then, if you can determine the scale of the photos, it must be pos- ble to get the desired data. Of course you can use photos to get information about objects. This kind of - formation is different: So, for example, you may receive qualitative data (the house seems to be old, the walls are...