Photogrammetric Analysis Using a Personal Computer

by Janet Brelin, GM,
M. Holcomb, GM,
W. Cichowski, GM,

Document Type: Proceeding Paper

Part of: Microcomputer Applications in Transportation II


In many cases, photographs of the accident scene taken soon after the event contain visible evidence of road marks and/or debris. By the time the case reaches the accident investigator/reconstructionist, the actual road evidence may no longer exist. Therefore, a two dimensional method of reconstructing evidence found in photographs has been implemented at General Motors and is available in the FotoGram program. FotoGram, a two dimensional photogrammetry software package, is useful in analyzing photographs in the area of accident reconstruction. With proper photographic techniques and care in reference point measurement, the layout of roadway and other surface evidence can be determined with greater accuracy and less time consumption than with conventional hand measurement and calculation.

Subject Headings: Computer analysis | Traffic accidents | Photogrammetry | Photography | Construction management | Computer aided operations | Debris | Computer software

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