Primary data sources. Those that generate data that has to be adapted or converted are called secondary

Resolutions

The most important parameters that define the characteris- tics of a remote sensing system are its resolutions. These define the level of detail of the products that it creates. Res- olutions depend on both the sensor and the platform as an single operative unit, and on the individual characteristics of each of them. Four resolutions can be defined:

• Spatial resolution. It indicates the size of the smaller object that can be distinguished. If the output is an im- age, the spatial resolution is the real size of the area represented by a single pixel.

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