Читать книгу Imagery and GIS - Kass Green - Страница 66

The size, shape, and accessibility of a project area often determine the platform used to collect the imagery. Utility corridors, coastlines, and sinewy river corridors are often mapped best with airborne platforms instead of satellite imagery because, unlike satellites, aircraft can closely follow the shape of the project area. Large statewide, regional, or country-sized areas can often best be mapped from satellites with large image footprints. Areas inaccessible to aircraft because of government restrictions are best imaged with satellites. Small areas inaccessible to aircraft because the infrastructure does not exist to support aircraft operations might be best imaged by a UAS.