A GIS Method for Geodetic Applications: The Central Apennine Geodetic Network (GeoNetGIS)

Riassunto

we must still organize the data base and think how to manipulate the large amount of data. New advances arise continuously in the storage, retrieval and data interpretation, including spatial and temporal variations. Between Umbria (Norcia area), Abruzzo and southern Lazio (Sora area) regions, was set up and surveyed a GPS network. This paper illustrates a GIS developed as a geodetic project, funded by the Italian Space Agency, to evaluate the present day crustal deformation of the Central Apennine region (Central Italy) by space geodesy techniques. The GIS uses space based integrated observations, such as GPS, DinSAR and remote sensing. Estimate geodetic deformation in high risk seismic area that experienced past destructive earthquakes and investigate active faults and seismogenic sources relationships, are our targets. To improve geodetic data interpretation, different data layers can be easily managed and dynamically analyzed. Data layers can be periodically updated at each new geodetic campaign and the analysis repeated every time new data are added to the repository.
To geophysical research and monitor crustal deformation in seismic and volcanic areas, a Geodetic Geographical Information System has been developed (GeoNetGIS). We applied our geodetic oriented GIS to a new GPS network recently set up and surveyed in the Central Apennine region. The Central Apennine Geodetic Network (CA-GeoNet) consists in 130 stations with an average grid of 5 km, covering the main seismogenetic structures of the area. Management and mapping GPS networks with large multi-scaled data set, geographically referenced and with continuous or discrete coverage, required a multidisciplinary approach. GeoNetGIS, allow us, to analyze in three and four dimensions GPS sources, improve crustal deformation analysis and tectonic structure interpretation. Thematic Layers can be set up by many different databases such as Geodesy, Topography, Seismicity, Geology, Geography and Raster Images. GPS site displacements, velocity vectors and strain rate maps, gained by numerical and spatial analysis, can be showed...