Environmental application of aerial reconnaissance to search for open dumps
Three approaches to using aerial photography are evaluated for searching for open dumps in the state of Indiana. Photography with hand-held cameras from a small airplane proved more effective and flexible than either photo-interpretation of existing air photos or subcontracting to a federal agency for new aerial photography. The rationale for our choice of aerial reconnaissance, other uses of low-level aerial surveillance, the utility of small-format camera aerial photography for environmental analysis, and methods used for locating open dumps are discussed.
MINI-FORMAT REMOTE SENSING FOR CIVIL ENGINEERING
Information (data) acquisition is an important part of civil engineering practice, especially in the preparation of environmental impact assessments. The mini-format remote sensing system is used to gather on-site data by exposures of both color and color infrared films for site condition identification and interpretation using two hand-held 35-mm cameras (50-mm lenses) mounted with a mechanism to trip the cameras' shutters simultaneously. Photography is taken from an open door or window of a single engine aircraft at an altitude of 500-1,000 ft. The interpretation may be accomplished by projecting the color and color infrared slides, side by side, on two screens or using an 8x magnifier and viewing the slides on a light table; thus observations and analyses are made of vegetation vigor, disease or stress, drainage problems, slope stability, landslide susceptible terrain, reclaimed land progress, locations of abandoned mines and field tile, pavement deterioration, water quality, and wetland and natural resources classifications.
Spot photography for map revision
Introduction One of the first major tasks of the Division of National Mapping is to make a large contribution towards the overall target of the completion of a planimetric map coverage of Australia's 3,000,000 square miles at 1: 250,000 scale. It is anticipated this first series of maps of Australia, compiled entirely from air photography, will be completed and available to users by the end of 1965.