Accuracy assessment is performed by comparing the two different maps created from remote sensing analysis to a reference map based on the different source. The important of accuracy assessment and error analysis is to permit the quantitative comparisons of different interpretations. In order to compared, the map need to be evaluated and the reference map, both must be accurately registered geometrically to each other. They also must use the same classification scheme and they should have been classified at the same level of detail. This type of assessment is called site-specific accuracy which is based on a comparison of the two maps at specific location for example; individual pixels in two digital images. In this type of comparison, it is clearly that the degree to which the pixels in one image spatially align with the pixels in the second image contributes to the accuracy assessment result. Errors in classification should be distinguished from errors in registration or positioning of boundaries. Another useful form of site-specific accuracy assessment is to compare field data or training data at a number of locations within the image, similar to the way spatial accuracy assessment using ground checkpoints is performed for digital orthophotos and terrain models.
My Lab 5 Report :
Lab 5 Accuracy Assessment (GLS 612)
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