Canadian Forest Service Publications

Digitizing aerial photography –Understanding spatial resolution. 2000. Nelson, T.A.; Wulder, M.A.; Niemann, O. Pages 451-458 in Remote Sensing and Spatial Data Integration: Measuring, Monitoring and Modelling., Proceedings: 22nd Symposium of the Canadian Remote Sensing Society. August 20-25, 2000, Victoria, British Columbia. Canadian Remote Sensing Society, Ottawa.

Year: 2000

Issued by: Pacific Forestry Centre

Catalog ID: 5517

Language: English

Availability: PDF (download)

Mark record


Accuracy, flexibility, and cost effectiveness are advantages of using digitized aerial photographs as a data source. However, the relationship between the resolution of digital images, and the aerial photographs from which they were derived, must be addressed.

In the following paper we consider issues that impact the spatial resolution of photographs and digitized images, and suggest how users can optimize spatial resolution by selecting an appropriate scanning aperture. Optimal scanning aperture can be chosen by considering the camera system resolution, the original photograph’s scale, and the desired pixel size of the digital image.

There are optimal scanning resolutions to use when digitizing aerial photographs. Optimizing spatial resolution will maximize the spatial information obtained from the original photographs without generating unnecessarily large file sizes.