Photogrammetric system and photogrammetric method

A photogrammetric system comprising:

• a camera installed in a movable body, the camera including a shutter unit that unidirectionally moves an exposed portion on an imaging surface across a shutter frame from a long side to another long side, the camera being configured to capture an image by causing the shutter unit to expose the imaging surface from the long side to the other long side;
• a first time provider having a function of providing first time relating to capture timings to the image captured by the camera;
• a capture position measuring unit configured to measure a capture position at which the camera captures the image;
• a second time provider having a function of providing second time relating to measurement timings to a measurement result in response to measurement by the capture position measuring unit;
• and
• a photogrammetry data generator configured to associate the image captured by the camera and the capture position measured by the capture position measuring unit based on the first time and the second time, extract a feature point from the image, calculate an offset time that is a time period from when the camera starts capturing the image to when a portion of the feature point is exposed, from a relation between a position of the feature point in the image and the moving time where the exposed portion is moved by the shutter unit, and calculate a capture position corresponding to a feature point capture time as the feature point capture position, the feature point capture time being obtained by adding the offset time to the first time corresponding to image capture start time, and generate data for use in photogrammetry, the data including the feature point capture position.