Question

Write short notes on Satellite data as a major data source in GIS.

Answer 1

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Thematic data (also known as discrete) represents features such as land-use or soils data.

Continuous data represents phenomena such as temperature, elevation, or spectral data such as satellite images and aerial photographs.

Pictures include scanned maps or drawings and building photographs.

Thematic and continuous rasters may be displayed as data layers along with other geographic data on your map but are often used as the source data for spatial analysis with the ArcGIS Spatial Analyst extension. Picture rasters are often used as attributes in tables—they can be displayed with your geographic data and are used to convey additional information about map features

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