Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/7066
AuthorsMadonia, P.* 
Pecoraino, G.* 
Sammarco, C.* 
TitleGeoreferenced cartography dataset of the La Fossa crater fumarolic field at Vulcano Island (Aeolian Archipelago, Italy): conversion and comparison of data from local to global positioning methods
Issue DateJul-2011
Series/Report no.3/54 (2011)
DOI10.4401/ag-4941
URIhttp://hdl.handle.net/2122/7066
KeywordsGeochemical data
Volcano monitoring
Volcanic risk
Fumarole
GPS
Map
Vulcano Island
Subject Classification04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring 
AbstractThe present study illustrates the procedures applied for the coordinate system conversion of the historical fumarole positions at La Fossa crater, to allow their comparison with newly acquired global positioning system (GPS) data. Due to the absence of ground control points in the field and on both the old Gauss Boaga and the new UTM WGS 1984 maps, we had to model the transformation errors between the two systems using differential GPS techniques. Once corrected, the maps show a residual Easting shifting, due to erroneous georeferencing of the original base maps; this is corrected by morphological comparative methods. The good correspondence between the corrected positions of the historical data and the results of the new GPS survey that was carried out in 2009 highlights the good quality of the old surveys, although they were carried out without the use of accurate topographical instruments.
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