NTA-NET (UGC-NET) Geography (80) Cartography-Digital Image Processing, Remote Sensing and Big Data Study Material (Page 8 of 11)

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Types of Accuracy

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Measurement of Map Accuracy

  • To assess the accuracy of a map, it is necessary that the map and reference data be co-registered, that they both use the same classification system and minimum mapping unit, and that they have been classified at comparable levels of detail. For remotely-sensed data to be truly useful and effective, an appropriate technique of accuracy assessment needs to be perfor…

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Data Requirements, Sampling Approach, and Sample Size

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  • The data requirements for performing a classification include remotely-sensed data, ground-truthed training data for characterizing spectral parameters of each class (e. g. , “plant community type” ) , and an independent set of ground-truth data (reference data) for accuracy assessment.
  • One must use an appropriate sampling technique that meets statistical requirements. Site-specific accuracy assessment can be evaluated for an overall classification or on a per-categor…

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