NTA-NET (UGC-NET) Geography (80) Cartography-Digital Image Processing, Remote Sensing and Big Data Study Material (Page 3 of 11)

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Digital Image Processing: Accuracy Assessment

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Accuracy Assessment

Obtaining accuracy of the final map derived by processing remote sensing data is known as accuracy assessment. This is done by comparing satellite data with reference data. Some possible sources of reference data include

  • Aerial photo interpretation
  • Ground truth with GPS
  • GIS layers

Accuracy of land cover map typically does not differentiate between position (where the placement in map is incorrect) and thematic (where the features are misidentified) errors.

Reference data must be chosen keeping in mind the following:

  • Chosen reference source must be able to provide informa…

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Remote Sensing Applications

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Remote sensing can be used in various fields and applied towards the analysis of various important concepts. Some of the major applications are summarized below:

  • Applications in agriculture
    • Crop type classification
    • Crop condition assessment
    • Crop yield estimation
    • Mapping of soil characteristics
    • Mapping of soil management practices
    • Crop monitoring and damage assessment
    • Soil moisture level determination
  • Applications in forestry
    • Forest cover mapping
    • Forest density mapping
    • Forest fire identification and mapping
    • Biomass …

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