Towards a repository of available worldwide data used in physical geodesy- PGrep
20/09/2016 | 17:30 | Session 3: Local/regional geoid determination methods and models
Author(s): Matej Varga, Marijan Grgić, Olga Bjelotomić and Tomislav Bašić
Matej Varga, Marijan Grgić, Olga Bjelotomić and Tomislav Bašić
Data are fundamental part for any research in physical geodesy and related scientific fields. Physical geodesists are specifically interested in data and models such as gravity data, GNSS/benchmarks, digital elevation and bathymetry models, geopotential and crustal models.
Data are continuously published and available worldwide and its finding and preparation for
usage require investing significant efforts and time. This is due to (1) different international and
local, private and public data publishers (2) different data usage and sharing policies (3) different
data formats and structures, and (4) lack of metadata. In addition, publishers of data often does
not address geodetic datum or reference system, epoch, origin, and predicted quality or
processing methods employed.
In this work we inspect main properties of about 4 million geodetic points and 100 models
collected from more than 140 sources. Data and models are described in terms of their spatial
extent, distribution policy, structure and available metadata. Results will provide basic
information needed for planned creation of the unique worldwide repository of published and
accessible data and models. When published, repository shall serve as connecting point
between researchers and data publishers.