Abstract
Small-format aerial photography is seen as a low-cost alternative to large-format photography for local area mapping. As CCD sensor resolutions and format sizes improve, digital sensors are becoming viable alternatives to small-format analogue cameras. This article reports on investigations into the use of the Kodak DCS460 digital camera for mapping the Marconi Beam informal settlement in Cape Town. Issues involving the practical use of the camera including calibration, photogrammetric limitations, image interpretation and measurement are discussed. Stereopairs of DCS460 images at 1 : 18,500 scale yielded accuracies in the order of ±0.2 m in planimetry and ±0.6 m in elevation. While these accuracies are sufficient for many mapping exercises the limited format size of the camera and slow image download times economically restrict application of the camera to the mapping of small areas.
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