Practical Use of Photogrammetry in Kanagawa Prefectural Police

Abstract

A diagram has been annexed to the spot inspection record of the traffic accident or incident were drawn up with measuring-tape heretofore. We introduced the method applied with photogrammetry partially into the police since 1969. Sixteen (16) of the stereo-camera (base length-120 centimeter) were provided and came into use for the investigation of traffic accident and incident at present. These methods have produced some good effects on speedy spot investigation, quick settlement of traffic stagnation along with specialization and efficient investigation and prevention of traffic policemen from traffic accident. These stereo-cameras are utilized in another field actively in order to use them efficiently.Take some sample of our practical use of them, these instrument are utilized for investigation of the road structure at the intersection of traffic accident frequency or scheme of road improvement in order to root out of traffic accident. Furthermore, they are employed in the inspection of the ultimate causes of accidents due to the road administration. Inspect the desruction of the“motorcar to motorcar”accident and make out the identification materials to study the cause of accident. Write out the study documents of the cause of“roll-up”accident by the large-sized vehicles to study of the prevention measures of such accident. These instruments produced much good effects on calculation of area and volume required by the nature of the criminal cases. In recent years, the stereo-camera (base length-20 centimeter) had been developed. It is expected that it will be utilized to make correct dianognosis a part of casualty (sufferer) .A system with stereo-cameras as axis (main-instrument) produced low cost, simple operation, almost unnecessary for control point surveying and less influence of the weather as compared with the aerial photogrammetry. As the stereo-camera has like this advantages, it is presumed that there is enough room to be utilized widely in the public.It is ten (10) years since the police had introduced the photogrammetry, we believed that we should make every efforts to extend practical use of the instrument.