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C. Galambos, G. Timár, B. Székely:
"GPS-navigáció történeti és modern földtani térképeken (GPS navigation on historical and modern geological maps)";
Földtani Közlöny, 139 (2009), 1; 93 - 100.

The usage of georeferenced maps in GIS applications provides the
possibility to apply geological maps in real-time GPS-navigation. In these
tasks, both historical and modern geological maps can be applied. A
georeferenced raster file of a geological map can be rendered as a
background image in GPS software on a Personal Digital Assistant (PDA).
The software shows the actual position provided by the GPS-navigation on
this background. Thus, the information on a geological map can be
interpreted directly in the field at exactly the position of the observer.
Using this procedure with modern maps, it provides an interestign new form
of application for users. The usage of historical maps is also a possible
application for the mapping geologists, too. Thius study gives an
algorithm of such an application and tackle the problem of the
characteristic errors associated with it.