Automated landing zone site surveying

An imaging system (10) includes a processor (12), a detection assembly (14) configured to collect survey data characterizing a respective height and location of physical features of a geographic region, a receiver assembly (16) configured to provide location data characterizing a geolocation of the geographic region, a tilt sensor (18) configured to provide tilt data characterizing an inclination of the detection assembly with respect to gravity, and a magnetic-field sensor (20) configured to provide field data characterizing a magnetic field associated with the geographic region. The processor is configured to perform processing of the survey data and tilt data to yield a first corrected data set, obtain magnetic-deviation data associated with the geographic region, determine an indication of true north, and process the first corrected data set and true-north indication to yield a second corrected data set comprising the first corrected data set oriented to true north.