Parent Topic: Available Types of Data
Precision Corrected (Geocoded) Data
Corrections are made for the residual errors remaining after the
systematic errors have been corrected. The bulk processing corrections
are based, in part, on tape header information received from the satellite.
Since this information is not very accurate, some errors will remain after
the processing is complete.
GCPs are used to correct the residual errors,
creating a geocoded image. Ground control points can be defined as
``features of known ground location that can be accurately located on
the digital imagery'' (Lillesand and Kiefer, 1987). A good example of a
suitable GCP is a highway intersection.
It is common practice to superimpose a full latitude and longitude grid
on the georeferenced image.
Parent Topic: Available Types of Data
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