Assessing the Accuracy of Remotely Sensed Data: Principles by Russell G. Congalton

By Russell G. Congalton

Congalton does an exceptional task proposing distant sensing accuracy evaluate techniques. as well as the speculation, he presents functional examples to aid in utilizing the idea to actual global situations.

The booklet turns out means over-priced for its dimension.

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Extra resources for Assessing the Accuracy of Remotely Sensed Data: Principles and Practices, Second Edition (Mapping Science)

Sample text

Estimating positional error parameters requires the comparison of coordinates and/or elevations of identical sample locations from: • The spatial data set to be assessed (map or imagery) and • The reference data, which must be an “independent source of higher accuracy” (FGDC, 1998). indd 25 11/4/08 6:03:49 PM 26 Assessing the Accuracy of Remotely Sensed Data: Principles and Practices We rely on samples because measuring every point in the geospatial data set being assessed would be prohibitively expensive, and sampling can provide highly reliable estimates of the error population’s parameters.

Researchers, notably Hord and Brooner (1976), van Genderen and Lock (1977), and Ginevan (1979), proposed criteria and basic techniques for testing overall map accuracy. , 1982; Congalton and Mead, 1983; Congalton et al. 1983). Finally, from the late 1980s up to the present time, a great deal of work has been conducted on thematic accuracy assessment. More and more researchers, scientists, and users are discovering the need to adequately assess the thematic accuracy of maps created from remotely sensed data.

However, as a technology matures, more effort is dedicated to data quality and error/accuracy issues. By the early 1980s, some researchers began to consider and realistically evaluate where they were going and, to some extent, how they were doing with respect to the quality of maps derived from digital remotely sensed data. The history of assessing the thematic accuracy of maps derived from remotely sensed data is relatively brief, beginning around 1975. Researchers, notably Hord and Brooner (1976), van Genderen and Lock (1977), and Ginevan (1979), proposed criteria and basic techniques for testing overall map accuracy.

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