GEOG 2420 Chapter 6: Geog 2420 Chapter 6

• School: University of Guelph
• Department: Geography
• Course: GEOG 2420
• Professor: John Lindsay

Document Summary

Is the art and science of making accrue measurements by means of aerial photography. Analog photogrammy is performed using data that are in hard copy format. Digital photogrammy is performed using a computer and digital aerial photography. These measurements can be obtained from a single vertical aerial photograph using photogrammy: These quantitative measurements can be made using multiple stereoscopic aerial photographs and stereoscopic parallax: Precise planimetric object location of building footprints, streets, and shorelines. A flightline of vertical photography is obtained by mounting a camera to an aircraft and obtaining photographs of terrain directly beneath the platform at specific exposure stations. The time between individual exposures along a flightline is determined by setting the camera. The aerial photographer takes into account the speed of the aircraft and the scale desired and sets the intervalometer so that each vertical aerial photograph overlaps the next by about.