Positional uncertainty in natural resource spatial data: The contribution of camera tilt and terrain relief

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Errors were estimated for GIS spatial data derived via monoscopic interpretation of 230 mm (9-inch) aerial photographs. Positional and area error were observed for a range of photo scales, camera tilts, and relief. Average positional error was observed between 4 and 104 meters and varied positively with tilt and terrain range and inversely with scale. Maximum average errors were approximately 3 to 4 times overall averages. Average errors in polygon area were observed over a range of polygon sizes, from 40 to 600 meters. Average percent area error ranged from 1.3 to 10.7 percent and was positively related to tilt and terrain range and not related to scale or polygon size. The magnitude of these errors and the availability and cost of correction technologies suggest analytical methods for removing relief and tilt distortion should be used where possible.

Original languageEnglish (US)
Title of host publicationGIS/LIS 1991 Proceedings
PublisherPubl by ASPRS
Pages874-881
Number of pages8
ISBN (Print)0944426751
StatePublished - Dec 1 1991
EventProceedings of GIS/LIS '91 - Atlanta, GA, USA
Duration: Oct 28 1991Nov 1 1991

Publication series

NameGIS/LIS 1991 Proceedings
Volume2

Other

OtherProceedings of GIS/LIS '91
CityAtlanta, GA, USA
Period10/28/9111/1/91

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  • Cite this

    Bolstad, P. (1991). Positional uncertainty in natural resource spatial data: The contribution of camera tilt and terrain relief. In GIS/LIS 1991 Proceedings (pp. 874-881). (GIS/LIS 1991 Proceedings; Vol. 2). Publ by ASPRS.